All those tube links work for me except [email protected]. [email protected] and [email protected]. You do have to let the videos load and some tube links just will not paste regardless of the url. It was ever thus on the old site as well. Copyright is an issue with BBC links and some artistes are very tetchy about free downloads. Neil, Young and Bob Dylan being just two of them.
Anax:
It does seem to be specific videos that can't be embedded (even though they've got 'Share' and 'Embed' offered and they're shown as having a standard Youtube licence).
For example, this link will take you to the Youtube video which I believe Mikey was trying to post:
http://tinyurl.com/j5f9dj7
If you copy the Youtube URl from your address bar and try to post it here I don't think it will work. (It didn't for me).