It's been a while since I checked the official Edgar Rice Burroughs channel on Vimeo. I visited it this morning and see they've uploaded a few more clips. Each video is a nice vignette of different properties ERB created, mostly of Tarzan, there is a good one on Barsoom too.
I particularly enjoyed the one of Pellucidar. It's surprisingly long and covers a lot of material. The others are much shorter.