I got that same Youtube error on two videos in a row the other day, but have since imported several without problem. I thought it must have just been a problem with those two videos. I guess maybe I cought them during a test of the new code or something.
I guess now we just have to rip the videos and do a manual upload. No big deal. It's just one additional step. Hopefully the next update will have a fix for this.
Do you think this is the root of the problems others were having after the upgrade? I was putting it off for a couple of days to see what the initial feedback was.