There is no problem with watching any vids here, at least not for me. If the vid is not viewable on this site directly, it takes you to YouTube where it is. Simply click anywhere on the black screen, where it says 'video unavailable!! Plus, it does say 'watch on YouTube....just click. Watch.
YouTube and Facebook have both changed their policies on videos. Beyond my technical understanding, but I can still watch. It is when you copy/paste the URL that it may not directly show, but it is still accessible, by just clicking away.