Same issue - blank screen
I've been having the same (apparent at least) issue as the OP. If I click on a thumbnail on the YT home page, the video plays fine. All the iplayer stuff plays fine on the major channels.
If I do a search, like a did for Concorde, I see the thumbnails but when I click I just get a black screen with no controls. So can this be a solely Flash issue? Happens with Chrome and FF. Why just on a video I find through search?
Silly question but do I have to have an account with YT to use search? Used search before with no issues.
Many thanks.