Interestingly, Facebook now refuses to let me watch embedded YouTube videos, insisting I must download the latest version of Flash—fat chance! says I
—but the same videos are viewable without incident, in Flash, at YouTube.
So far i haven't seen that misbehavior (using MacOS 10.6.8, Safari 5.1.2, Flash Player
11.1.102.55 and ClickToFlash 2.5.6)
Does that happen with every YouTube link, or most, or?
Does the preview image (if there is a preview image) have the
play button (a right-pointing arrow)?
There
has been a history of facebook/youtube problems with respect to the play button which i
have experienced myself sometimes (seemingly randomly), when
posting links. [[e.g., no play button, no preview and/or a Captcha instead of either.]] But those issues seemed to go away once i adopted youtube's
shorter URLs (replacing the "http://www.youtube.com/watch?v=" part with "http://youtu.be/").