Dates may be either the date the video was created or the upload date to the video service, depending on what's available. Many of the web pages here have additional and updated information, not just the bare video.
Corrections/additions/comments welcome. We (clearly) can't aim to be comprehensive, but are happy to receive suggestions.
TeX and friends - Donald Knuth - Typography and fonts.
Videos from TeX conferences are linked separately.
2017-11-29: BSDNow TV Web cast, from 1:04 to 1:18, a discussion of Donald Knuth, TeX, LaTeX, and ConTeXt.
2016-11-16: Sebastian Rahtz memorial.
2018-01-12: All questions answered, Luleå University of Technology.
2017-07-18: Invitation to Knuth's organ composition Fantasia Apocalyptica, by organist Jan Overduin (Fantasia Apocalyptica web page.)
2017-03-15: History of Stanford's computer science department, panel discussion.
2016-09-21: 32 years of TeX and Metafont, at the San Francisco Public Library.
2016-02-04: Analysis of algorithms (hi-res) Historical re-enactment of inaugural lecture given on 1969-11-04 upon becoming a Stanford professor.
2015-11-04: All questions answered, University College Cork.
2014-06-14: Computer Science: All questions answered, UPMC Campus Jussieu.
2013-09-27: Let's Not Dumb Down the History of Computer Science, 2014 Kailath lecture.
2013-05-21: All questions answered, JKU Linz.
2013-05-16: All questions answered, Vienna Gödel Lecture, TU Wien.
2011-05-17: All questions answered, Stanford Engineering Hero Lecture.
2011-03-24: All questions answered, Google Tech Talk.
2010-06-30: An Earthshaking Announcement, lecture given at TUG 2010 in San Francisco (paper).
2009: Lecture about DEK, part 1 and part 2, by Leon Sterling.
2006-04: Web of Stories, series of 97 videos. Some TeX-related and other selections:
1982-07-28ff.: The internal details of TeX82, twelve sessions:
1981-03-02ff.: Advanced TeXarcana, five sessions:
1981-02-23ff.: TeX for beginners, five sessions:
Ongoing: Herb Lubalin Lecture Series, Type@Cooper NYC.
2016-06-07: The last punchcutter, a documentary on Giuseppe Brachino, recreating a Griffo engraving.
2016-06: Typographers of the Road (trailer), about road painting, by O Street.
2016-04-23: St Brigid Press: How type is made, part 2—wood type
2016-04-12: St Brigid Press: How type is made, part 1—metal type
2016-03-15: Edward Johnston: Calligraphy & Type Design, Ewan Clayton, Type@Cooper West.
2016-03-15: Presentation on Bodoni by Valerie Lester, San Francisco.
2015-12-02: Pace Matters, Nick Benson, third-generation stone carver and owner-operator of the John Stevens Shop, founded in 1705.
2015-10-26: How Aldus Manutius Saved Western Civilization, G. Scott Clemons, Type@Cooper NYC.
2015-08-03: Humanform Letterform, Sumner Stone, Type@Cooper NYC.
2015-06-15: Words, Petr van Blokland, Type@Cooper NYC.
2015-05-12: Linotype: End of an era at the New York Times.
2013-12-12: The Great 202 Jailbreak, reverse engineering the Linotronic 202 typesetter at Bell Labs, David Brailsford, Computerphile.
2012-08-11: Linotype typesetting, Salesian Vocational.
2009-01-09: RGB vs. CMYK color models, PressCats.com.
Thanks to those contributing the links: Nelson Beebe, Barbara Beeton, David Walden.