You know... its funny, out of all the modifications Samsung made, this was my favorite, however it is a shame it is only in the Video player and not YouTube.... anyways I will check for you now.
EDIT: sorry, but no... it actually glitched up the lockscreen, I pressed the lock key and then I pressed it again... lol the lockscreen was upside-down! Lol, anyways I bet a third party app or player could probably do that
Sent from my HTC Glacier
Samsung Vibrant CyanogenMod 10.1
Kindle Fire CyanogenMod 10.2
DEAD HTC DREAM :C