Are these the videos that you post that don't seem to work? Or every video posted on this website?
What works for me is clicking on the video icon (1) on the left and pasting the "embed code" there.
Or click on the html button (2) on the right where you can also paste this code.
It seems to be working :)
It's been a while since I watched that documentary.
Thanks for posting.
If this site goes down for a week again you can sign up at my site and post/forum-not as good as this site but good enough