I can also confirm problems with You Tube content. Running BSPlayer Pro v2.40.997, Windows Vista 32Bit SP1. All latest codecs installed as per bspcodecdl.exe.
This is one example
YouTube - The worst week of Hamiltons life - The lie at Australian GP 2009
and this another one
YouTube - World of Adventure - Bike Messengers
It was working a couple of weeks ago, although I still found 1 in 10 did not.