I've just got a Blackberry 8320 and I already own a BlueDio AVF2 headset. I've managed to get the pair to talk to each other and I can get the headset to play music just fine.
But if I try to play video the sound is output from the speakers instead of the headset.
I'm using the standard built-in media player and it only seems to have options to output the sound to speaker or handset, no bluetooth option I can see.
Maybe a 3rd party player would be better? I gave Mobiola xPlayer a try and I had the exact same thing happen.
I just bought the Motorola S9 and I was so stoked cause I couldn't get either video or music to play through earbuds. I am having the same troubles as you...music plays fine, but video player doesn't.
Someone in crackberry world must know - we can't be the only two out there trying this
Don't make me go back to my ipod to watch video and listen to music - please!!