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Lane Four · World Nations · Sources & Attributions

In 1776, There Was No Such Thing as an American

How thirteen quarreling British colonies became one nation — from the debts of an empire and the Stamp Act, through Lexington, the Declaration and a long war, to the Constitution and the argument it left unfinished. This page publishes every source behind the episode, the verdict on every contestable claim, and the provenance of every archival image on screen.

Watch the episode: youtube.com/watch?v=Dvc-di1w3t0 · 13:51 · premiered July 31, 2026.

Fact-Check: Green — Cleared for Narration

This episode passed two gates. An adversarial fact-check of the narration completed July 5, 2026, before a single line of voiceover was recorded: every contestable date, number, name, attribution and superlative verified against two or more reputable sources, with the National Archives, the Library of Congress and the National Park Service as gold sources. 30 claims verified, returning one required correction and two precision hedges. A second gate then required every figure shown on screen to carry at least two independent sources before it could be built — and corrected one of them again. All of it is published below, including the places where the two gates pull against each other.

What the fact-check changed

The deltas the gates forced. We publish these because a fact-check that never changes anything is not a fact-check.

Correction — the Common Sense sales figure

Written: “It sold hundreds of thousands of copies and changed minds by the thousand.”
Problem: The “hundreds of thousands” figure fails scrutiny as an unqualified statement of fact. It traces to Paine himself — who claimed 120,000 in three months and had every incentive to inflate — and to a biographer a century later who put it at 500,000. Ray Raphael's judgment is that “we simply do not know how many copies were sold.”
Narrated instead: “It became a sensation — read aloud in taverns, passed hand to hand, reprinted in town after town — and changed minds by the thousand.” The undisputed fact — enormous, unprecedented reach — is kept; the disputed number is dropped from the narration entirely.

Where the two gates disagree, and why we are telling you: the on-screen card in Chapter III does carry a figure — “≈120,000 copies in three months” — cleared by the later typeset gate on three independent sources (the National Constitution Center, Brandeis University Special Collections, and the Library of Virginia). That gate also corrected the figure the writer had drafted, from 100,000 up to 120,000, and it kept the ≈ qualifier deliberately, precisely because the scholarly debate about inflation of these counts is real and unsettled. So: the narration makes no numerical claim, and the card makes a qualified one. Both were sourced; neither is asserted as a precise count. If you want the skeptical case, it is source 20 below, and we recommend reading it.

Hedge — the weight of tea destroyed at the Boston Tea Party

Written: “dumped ninety thousand pounds of British tea into Boston Harbor.”
Finding: The standard figure is 342 chests, more than 92,000 pounds — about 46 tons. “Ninety thousand” rounds slightly low.
Narrated instead: “dumped more than ninety thousand pounds of British tea into Boston Harbor.”

Hedge — the death toll at Valley Forge

Written: “thousands died of cold, hunger, and disease.”
Finding: The National Park Service and others put deaths at roughly 1,700–2,000, and disease — not cold or hunger directly — was the biggest killer; about two-thirds of the deaths fell in the warmer spring months. “Thousands” sits at the low edge and misattributes the cause.
Narrated instead: “where as many as two thousand perished — most of them from disease.”

Figures shown on screen

A number on a card is a claim like any other. Every figure typeset into this episode had to carry at least two independent sources before it could be built.

On screenSources
Britain's national debt · 1763
£133,000,000
Eloranta & Land (2011), read in full: pre-war debt £74.6M rising to £132.6M, “nearly twice the previous amount” (Brewer series); the authors' own exchequer calculation gives £76.5M → £135.7M by January 1763. The card's figure sits between the two published series.
Common Sense
≈120,000 copies in three months
National Constitution Center; Brandeis University Special Collections; Library of Virginia. The ≈ qualifier is retained because the count is disputed — see the correction above.
The Boston Massacre
Attucks · Gray · Caldwell · Maverick · Carr
National Park Service, “Boston Massacre Trial”; The Freedom Trail Foundation; corroborated on spellings against a third reference.
The Articles of Confederation
ratified 1781 · no executive · no national courts · no power to tax
National Archives Milestone Documents (direct quotation verified at build); Encyclopaedia Britannica; National Constitution Center; the Gilder Lehrman Institute. Every line on the card is covered by at least two independent sources.

Claim by claim

The thirty contestable claims put through the narration gate, in order, with the chapter each falls in and the sources that carried it. Three carry the deltas above.

#Ch.ClaimVerdictKey sources
1IThe French and Indian War left Britain triumphant in 1763 and deep in debtVerifiedBritannica; Library of Congress
2ISugar Act 1764; Stamp Act 1765 taxed printed paper including newspapers and playing cardsVerifiedBritannica; Library of Congress
3I“No taxation without representation”; the Sons of Liberty; the boycottsVerifiedBritannica; Massachusetts Historical Society
4IBoston Massacre, March 5, 1770 — redcoats fired into a crowd; five killedVerifiedBritannica; National Park Service
5IBoston Tea Party, December 1773 — “Mohawk” disguise, 342 chestsVerified · weight hedgedBoston Tea Party Ships & Museum; Britannica
6IIntolerable/Coercive Acts 1774 closed Boston's port and stripped Massachusetts self-government, uniting the thirteenVerifiedBritannica; Library of Congress
7IIFirst Continental Congress, autumn 1774 — twelve colonies, Georgia absentVerifiedMount Vernon; Office of the Historian, U.S. Dept. of State
8IIApril 18–19, 1775 — the march to Concord, Revere's ride, the first shot at Lexington from an unknown sideVerifiedBritannica; NPS Minute Man NHP
9II“The shot heard round the world” was coined later, by a poetVerified · poet left unnamed, no misattributionEmerson, “Concord Hymn,” 1837
10IIThe Second Continental Congress created the Continental Army and chose George Washington to commandVerifiedBritannica; Mount Vernon
11IIICommon Sense — Thomas Paine, January 1776, an English immigrantVerified · sales figure correctedSmithsonian Magazine; Journal of the American Revolution
12IIIJefferson, a 33-year-old Virginian, drafted the DeclarationVerified (b. April 1743)Monticello; National Archives
13IIIJuly 2, 1776 — Congress voted independence; July 4 — adopted the DeclarationVerifiedNational Archives; Library of Congress
14III“All men are created equal”; unalienable rights — life, liberty, the pursuit of happinessVerified · direct quotationNational Archives, Declaration transcript
15IIIJefferson enslaved “more than a hundred” peopleVerified · true and conservative (607 over his life; ~100–140 at Monticello at a time)Monticello; White House Historical Association
16IIIFifty-six men signed the DeclarationVerifiedNational Archives
17IVWashington beaten around New York and driven across New Jersey, late 1776VerifiedMount Vernon; Britannica
18IVThe Delaware crossing, night of December 25–26, 1776; the surprise attack at TrentonVerifiedMount Vernon; Britannica
19IVSaratoga, October 1777 — the surrender of an entire British armyVerified (Burgoyne, ~5,900, Oct 17)American Battlefield Trust; Britannica
20IVFrance entered the war as an ally in 1778Verified (Treaty of Alliance, Feb 1778)Office of the Historian, U.S. Dept. of State
21IVThe Valley Forge winter; von Steuben, a Prussian volunteer, drilled the army into professionalsVerified · death count hedgedNational Park Service; History.com
22IVYorktown, autumn 1781 — Cornwallis surrendered to the French fleet and Washington's armyVerified (Oct 19)Britannica; National Park Service
23IVTreaty of Paris, 1783 — Britain recognized American independenceVerified (Sept 3, 1783)Office of the Historian, U.S. Dept. of State
24VThe Articles of Confederation were weak — no president, no real national courts, no power to taxVerifiedNational Archives; Britannica
25VShays' Rebellion, 1786 — armed farmers in MassachusettsVerifiedBritannica; Massachusetts Historical Society
26VThe Constitutional Convention, summer 1787 in Philadelphia, called to revise the Articles, wrote a new frame behind closed doorsVerifiedNational Archives; Library of Congress
27VThe Great Compromise — the House by population, the Senate equal per stateVerifiedNational Constitution Center; Britannica
28VThe three-fifths compromise (Art. I §2) and the slave trade shielded for twenty years, until 1808 (Art. I §9)VerifiedNational Constitution Center; Britannica
29VThe Constitution was signed September 17, 1787; the Federalist Papers were written by Hamilton, Madison and JayVerifiedNational Archives; Library of Congress
30VWashington inaugurated first President in 1789; the Bill of Rights in 1791Verified (ratified Dec 15, 1791)National Archives; Mount Vernon

Interpretive claims

Not every sentence in a documentary is a checkable fact. These were reviewed for whether they are framed as interpretation rather than asserted as fact — and kept, unchanged, because they are.

“Three-fifths of a person” (Ch. V) — the narration frames this as an apportionment count, which is the standard and defensible description. It does not assert that the clause was a statement of individual human worth.

“A promise only half-kept” and “the revolution never ended” (Ch. III and the close) — explicitly framed as interpretation, not fact.

“The most powerful empire on earth” (cold open) — a defensible characterization of Britain around 1776.

Sources

Every source consulted across both gates, numbered continuously and grouped by type. Where a gate recorded a direct link, it is given; institutions consulted at collection level are listed by name.

National archives and federal collections — gold sources

  1. “Declaration of Independence: A Transcription.” National Archives, America's Founding Documents. archives.gov/founding-docs/declaration-transcript
  2. “The Constitution of the United States: A Transcription.” National Archives. archives.gov/founding-docs/constitution-transcript
  3. “The Bill of Rights: A Transcription.” National Archives. archives.gov/founding-docs/bill-of-rights-transcript
  4. “Articles of Confederation (1777).” National Archives, Milestone Documents — quoted directly at build. archives.gov/milestone-documents/articles-of-confederation
  5. “Continental Congress, 1774–1781.” Office of the Historian, U.S. Department of State. history.state.gov/milestones/1776-1783/continental-congress
  6. “What Happened at Valley Forge.” National Park Service, Valley Forge National Historical Park. nps.gov/vafo/learn/historyculture
  7. “The Boston Massacre.” National Park Service. nps.gov/articles/000/boston-massacre.htm
  8. “The Boston Massacre Trial.” National Park Service — the five victims, named. home.nps.gov/articles/000/boston-massacre-trial.htm
  9. “History & Culture.” National Park Service, Minute Man National Historical Park — Lexington and Concord, April 19, 1775. nps.gov/mima/learn/historyculture
  10. Library of Congress — Continental Congress and Constitutional Convention collections, consulted for the imperial-debt and tax-act sequence, the Articles, and the Convention. Collection-level consultation; individual records for the images used are listed in the attributions table below.

Presidential sites and historic houses

  1. “Thomas Jefferson and Slavery.” Thomas Jefferson's Monticello. monticello.org/slavery
  2. “First Continental Congress.” George Washington's Mount Vernon, Digital Encyclopedia. mountvernon.org/library/digitalhistory

Museums, historical societies and battlefield trusts

  1. “The Destruction of the Tea.” Boston Tea Party Ships & Museum. bostonteapartyship.com/the-destruction-of-the-tea
  2. “Boston Massacre Site.” The Freedom Trail Foundation. thefreedomtrail.org/trail-sites/boston-massacre-site
  3. “Battle of Saratoga.” American Battlefield Trust. battlefields.org/learn/revolutionary-war/battles/saratoga
  4. “America's First 'Viral' Post.” Smithsonian Magazine, on the publication of Common Sense. smithsonianmag.com/smart-news
  5. Massachusetts Historical Society — consulted on the Sons of Liberty, the non-importation boycotts and Shays' Rebellion; also the holder of Jefferson's Farm Book, shown on screen.
  6. White House Historical Association — consulted on Jefferson and the people he enslaved.
  7. Brandeis University, Special Collections and the Library of Virginia — the two corroborating sources for the Common Sense print-run card.

Constitutional reference

  1. Article I, Section 9, Clause 1 — the Slave Trade Clause, with the three-fifths and Great Compromise material. National Constitution Center, Interactive Constitution. constitutioncenter.org/the-constitution/articles/article-i
  2. “Articles of Confederation.” National Constitution Center, Historic Document Library. constitutioncenter.org/historic-document-library
  3. “Articles of Confederation, 1777.” The Gilder Lehrman Institute of American History. gilderlehrman.org/history-resources

Scholarly work and journals

  1. Jari Eloranta and Jeremy Land, “Hollow Victory? Britain's Public Debt and the Seven Years' War.” Essays in Economic and Business History vol. 29 (2011), pp. 101–118 — the source for the £133,000,000 debt card, read in full text. ebhsoc.org/journal/index.php/ebhs/article/view/215
  2. “Thomas Paine's Inflated Numbers.” Journal of the American Revolution, March 2013 — the source that removed the Common Sense sales figure from the narration. allthingsliberty.com/2013/03/thomas-paines-inflated-numbers
  3. Ray Raphael, on the unknowability of Common Sense print runs — “we simply do not know how many copies were sold.”
  4. Smith College, Climate in Arts and History — on the winter encampment at Valley Forge, 1777–1778, consulted for the seasonal distribution of deaths.
  5. English Short Title Catalogue W31710 and the Lilly Library, Indiana University — edition identification for The American Crisis, Number I.

Primary text

  1. Thomas Paine, Common Sense (Philadelphia: R. Bell, January 1776).
  2. Thomas Paine, The American Crisis, Number I (Philadelphia: Melchior Styner and Charles Cist, December 19, 1776). Scan: University of Pennsylvania, Colenda Digital Repository. colenda.library.upenn.edu/catalog/81431-p3z893h19
  3. The Federalist, Number I (New York: J. and A. M'Lean, 1788). Scan: Boston Public Library via the Internet Archive. archive.org/details/federalistcollec00hami · catalog record: Library of Congress
  4. Ralph Waldo Emerson, “Concord Hymn” (1837) — the origin of “the shot heard round the world,” written sixty-two years after the event.

Encyclopedic and general reference

  1. “Boston Massacre.” Encyclopaedia Britannica. britannica.com/event/Boston-Massacre
  2. “Boston Tea Party.” Encyclopaedia Britannica. britannica.com/event/Boston-Tea-Party
  3. “Three-fifths Compromise.” Encyclopaedia Britannica. britannica.com/topic/three-fifths-compromise
  4. “Valley Forge.” History.com. history.com/articles/valley-forge
  5. “Common Sense.” Wikipedia. en.wikipedia.org/wiki/Common_Sense
  6. “Boston Massacre.” Wikipedia. en.wikipedia.org/wiki/Boston_Massacre
  7. “Boston Tea Party.” Wikipedia. en.wikipedia.org/wiki/Boston_Tea_Party
  8. “First Continental Congress.” Wikipedia. en.wikipedia.org/wiki/First_Continental_Congress
  9. “Thomas Jefferson and slavery.” Wikipedia. en.wikipedia.org/wiki/Thomas_Jefferson_and_slavery

Asset Attributions

Everything presented as the historical record in this episode — every painting, engraving, document, map and object — is genuine archival material, credited on screen as it appears. Nothing shown as the record is AI-generated. Where AI is used at all, it is used for atmosphere and for camera motion over real art; that is disclosed in full below.

Archival works — public domain (41 credited on screen)

WorkRepository / holderPD basisRecord
King George III in coronation robes — Allan Ramsay, c. 1765Wikimedia Commons (Google Art Project)Age (Ramsay d. 1784) · 2-D reproCommons
The Death of General Wolfe — Benjamin West, 1770National Gallery of Canada, Ottawa (via Commons)Age (West d. 1820) · 2-D reproCommons
The Sugar Act — The New-Hampshire Gazette, June 1764Library of Congress, Chronicling AmericaUS-Gov · Age (1764)LoC
Stamp Act revenue stamps — proof sheet, 1765Immediate source not recorded — see note belowAge (1765) · 2-D repro—
The Bostonians Paying the Excise-Man — London, 1774The Metropolitan Museum of Art (via Commons)Age (1774) · CC0Commons
British Troops Landing at Boston — Paul Revere, 1768New York Public Library, Digital CollectionsAge · NYPL free-to-useNYPL
The Bloody Massacre — engraved by Paul Revere, 1770Wikimedia CommonsAge (1770) · 2-D reproCommons
The Boston Tea Party — W. D. Cooper, 1789Wikimedia CommonsAge (1789) · 2-D reproCommons
The Continental Association — signed in Congress at Philadelphia, 20 October 1774National ArchivesUS-Gov · Age (1774)NARA
Carpenters' Hall, Philadelphia — Première assemblée du Congrès, Barbier & Godefroy, 1782Library of Congress, Prints & PhotographsUS-Gov · Age (1782)LoC
Powder horn owned by Amos Barrett, Concord — c. 1775Concord Museum (photograph via Commons)Age (artefact) · CC0 photographCommons
A Plan of the Town and Harbour of Boston — J. De Costa, London, 1775Library of Congress, Geography & Map DivisionUS-Gov · Age (1775)LoC
The Battle of Lexington, Plate I — Amos Doolittle, 1775 (Goodspeed reprint, 1903)Concord Museum (via Commons)Age (1775) · CC0 photographCommons
The Engagement at Concord, Plate III — Amos Doolittle, 1775 (Goodspeed reprint, 1903)Concord Museum (via Commons)Age (1775) · CC0 photographCommons
The Pennsylvania State House (Independence Hall) — Columbian Magazine engraving, July 1787Wikimedia CommonsAge (1787) · 2-D reproCommons
Washington Taking Command of the American Army, Cambridge, 1775 — Currier & IvesThe Metropolitan Museum of Art (via Commons)Age (1876) · CC0Commons
George Washington — Gilbert StuartWikimedia CommonsAge (Stuart d. 1828) · 2-D reproCommons
Thomas Paine — after Laurent Dabos (two placements)Wikimedia Commons (Google Art Project)Age (Dabos d. 1835) · 2-D reproCommons
Common Sense — Thomas Paine, title page, R. Bell, 1776Library of CongressUS-Gov · Age (1776)Commons / LoC
Thomas Jefferson — Rembrandt Peale, 1800Wikimedia CommonsAge (Peale d. 1860) · 2-D reproCommons
Rough Draft of the Declaration — Thomas Jefferson, 1776Library of Congress, Thomas Jefferson PapersUS-Gov · Age (1776)LoC
The Declaration of Independence — engrossed copy, 1776National Archives (via Commons)US-Gov · Age (1776)Commons
Declaration of Independence — American Bank Note Co. engraving after John TrumbullWikimedia CommonsAge (pre-1929) · 2-D reproCommons
Farm Book — Thomas Jefferson, 1774Massachusetts Historical SocietyAge (Jefferson d. 1826)Mass. Hist. Soc.
The Phoenix and the Rose engaged on the Hudson, 16 August 1776 — after Dominic SerresNational Archives (via Commons)US-Gov · Age (1778)NARA
Continental Currency, Three Dollars — Philadelphia, 17 February 1776Wikimedia CommonsAge (1776) · 2-D reproCommons
Washington Crossing the Delaware — Emanuel Leutze, 1851 (two placements)The Metropolitan Museum of Art (via Commons)Age (Leutze d. 1868) · 2-D reproCommons
Surrender of General Burgoyne — John TrumbullU.S. Capitol Rotunda / Architect of the Capitol (via Commons)Age (Trumbull d. 1843) · 2-D reproCommons
Treaty of Alliance, United States and France — 6 February 1778National Archives (via Commons)US-Gov · Age (1778)Commons
The March to Valley Forge — William B. T. Trego, 1883Museum of the American Revolution (via Commons)Age (1883) · 2-D reproCommons
Baron von Steuben drilling the troops at Valley Forge — Edwin Austin Abbey, c. 1911 muralPennsylvania State Capitol, Harrisburg (via Commons)Age (Abbey d. 1911) · 2-D reproCommons
Siège de Yorktown — Louis-Nicolas van Blarenberghe, 1784Anne S. K. Brown Military Collection, Brown UniversityNoC-US · Age (artist d. 1794)Brown BDR
Surrender of Lord Cornwallis — John TrumbullWikimedia CommonsAge (Trumbull d. 1843) · 2-D reproCommons
American Commissioners of the Preliminary Peace Negotiations (Treaty of Paris, unfinished) — Benjamin West, 1783Winterthur Museum, Garden & Library, Delaware (via Commons)Age (West d. 1820) · 2-D reproCommons
Gen. Daniel Shays and Col. Job Shattuck — woodcut, Bickerstaff's Boston Almanack, 1787Wikimedia Commons (Google Art Project)Age (1787) · 2-D reproCommons
A New and Correct Map of the United States of North America — Abel Buell, 1784Wikimedia Commons (four sheets stitched)Age (1784) · 2-D reproCommons
Wedgwood antislavery medallion, “Am I Not a Man and a Brother” — c. 1787The Metropolitan Museum of Art, 08.242 (via Commons)CC0 · AgeCommons
Constitution of the United States — engrossed signature page, 17 September 1787National Archives (via Commons)US-Gov · Age (1787)Commons
Washington's Inauguration at Federal Hall, 1789 — Matteson & Sadd, 1849Library of Congress, Prints & PhotographsUS-Gov · Age (1849)LoC
Memorial of the Pennsylvania Abolition Society to Congress, signed by Benjamin Franklin — 3 February 1790National Archives (via Commons)US-Gov · Age (1790)Commons
Phillis Wheatley — frontispiece engraving after Scipio Moorhead, 1773The Metropolitan Museum of Art (via Commons)CC0 · Age (1773)Commons

Three further documents appear on screen with their titles typeset into the frame rather than in the credit crawl: The American Crisis, Number I (University of Pennsylvania, Colenda Digital Repository), The Federalist, Number I, M'Lean 1788 (Boston Public Library via the Internet Archive), and the Bill of Rights (National Archives, NAID 1408042). Their records are in the Sources list above.

One honest gap. The Stamp Act proof sheet is a genuine 1765 work in the public domain, but the immediate scan we used was swapped during production without its source being re-logged. Rather than cite a record we cannot prove is the origin of the pixels on screen, we are publishing the gap. It will be re-sourced and this row updated.

PD basis key: US-Gov — a work of, or digitized and published by, a United States federal institution; Age — the underlying work was published before 1930 or its author has been dead more than 70 years, placing it in the public domain by term expiry; 2-D repro — a faithful photographic reproduction of a two-dimensional public-domain work gains no new copyright (Bridgeman Art Library v. Corel Corp., 36 F. Supp. 2d 191, S.D.N.Y. 1999), so the scan inherits the original's status; CC0 — the holding institution additionally released the file under a CC0 public-domain dedication; NoC-US — the repository asserts no copyright in the United States.

Filmed footage

Real filmed material in this episode comes from the National Park Service (twelve stills across Independence, Minute Man and Valley Forge National Historical Parks, public domain), NASA (one orbital photograph of the New England coast, Johnson Space Center, public domain), DVIDS — courtesy of the U.S. Army Training Support Center (This Day in Army History: Battles of Lexington and Concord, Christopher Coyer) and the 3d U.S. Infantry Regiment “The Old Guard” (1st Twilight Tattoo 2019, Jacob Holmes) — and Pexels, twenty-two clips under the Pexels License. The Pexels licence requires no attribution; the photographers are Tom Fisk, Artem Podrez, Ilya Klimenko, max laurell, ArtHouse Studio, Media Loopers, Tima Miroshnichenko, CESAR CASANOVA, Fehér Péter, Alexander Grigorian, Florian Delée, 정규송 Nui MALAMA, Mario V.W.B.R. Obst, Kevin Krämer, Frank Litschel, Travelling Tourist, K, and Felipe David.

Where AI is used, and where it is not

We would rather tell you this plainly than let you find it. No person, document, map, artwork or event in this episode is AI-generated. Everything offered as evidence is real archival material, listed above. AI appears in exactly two places:

Atmosphere — 22 seconds, 2.7% of the runtime. Seven short generated fragments carry mood rather than information: a candle-lit ledger, a rider at night, a spark on flint, a distant white flag, a winter road. No legible text and no identifiable person appears in any of them; every figure is a rear silhouette. They are never presented as a record of a real moment.

Motion over real art — 84 seconds. Seventeen shots take a genuine public-domain painting or engraving from the table above and add camera movement or a parallax depth effect, so a still image can breathe on screen. The image is real and unaltered in substance; only the camera moves.

The episode is flagged as containing synthetic media on YouTube. The narration is performed by a synthetic voice — not a clone of any real person — and quoted passages from Paine, Jefferson and the founding documents are public-domain text read aloud.

Music and sound

The score is original and owned — seven cues composed and produced in-studio for this episode, not licensed from any library. Sound effects and ambience are licensed via Artlist under a Pro certificate; attribution is not required under that licence, and the recordists are credited here as a courtesy: Ambisonic Spaces, Soundholder, Mat Eric Hart, West Wolf, Guy Fleisher, Skyes Audio, Ivo Vicic, Selkor Studio, RZ Post, SoundBits, Dauzkobza and Unrealsfx.

Copyleft material

No CC-BY or CC-BY-SA licensed material appears in this episode. Two Creative Commons video files were gathered during research, one of them CC BY 3.0; neither was used in the finished film. Every third-party asset above is public domain, CC0, or licensed.