It should make it through, but it's how long the battery will last AFTER that I would worry about. My guess is no longer than 2 hours, but I don't watch a lot of video so I don't really know.
That's something I still haven't messed with. How are you watching full movies on your BB? Are you using DVD shrink? If so, how much can u compress it to fit on a memory card? I have an 8G card but I've only been able to shrink a movie down to about 1G.
check out the movies section on here. ive got like 5 movies on my card right now that I need to see. they are able to shrink them to 300-400 mb most times