I love the Library of Congress! Yes, an entity that has had some major issues in the past, and can be difficult to work with, but they do so much important work in preservation that I can't say I don't love 'em. One of the projects they have put onto the web is one dealing with the origins of American Animation called... The Origins of American Animation!
There are 28 videos to watch, covering a lot of ground. There are some widely-known classics featuring KrazyKat and others, and some absolute gems like I'm Insured and The First Circus.
The site's worth taking a long, hard look at, especially if you're into the early history of film. You'll likely walk away with a greater appreciation of what it takes to both make an animation, and how a lot of what we're seeing today was formed almost a century ago.
Klaus at Gunpoint
A Film Journal dedicated to all film.A segment of Office Supply Publishing.