There's a fair amount of Baer material on youtube. Mostly highlights, but it's better than nothing: https://www.youtube.com/watch?v=qs1VaA0SvZM
To the best of my knowledge: Braddock, Farr 1, Louis, Nova 1+2, Uzcudun, Carnera, Comisky, Foord, Galento, Levinsky 2+3 and Schmeling.
There used to be a great site, www.maxbaer.org that had all sorts of rare Baer footage. The developer of it used to post here. Unfortunately, it appears to have been taken down. Probably some sort of copyright BS
http://web.archive.org/web/20120425203943/http://www.maxbaer.org/clips.html I think all of those clips can still be found on youtube.