I don't know what's up with these video services. All my stuff plays perfectly natively, but when they stream from Vimeo or YouTube the audio gets ahead of the video. Short videos aren't a problem but the longer ones seem to baffle the streamers. Oh well. Better than nothing, I suppose. Most of these books, btw are fairly old, which is to say they reflect where my head was at (with the exception of the technical books and the spy books) from around 86 through 96.
I think next time I'll go a shelf at a time and get a bit more into detail.