Hi, I have a generic 7" tablet, It plays some avi but jumpy and olly some 3pg at all. It can play some mp4 but they are jumpy and out of sink. None of these are really good enough to watch. Whats the problem, I know I have the lowest spec tablet buy shouldnt it play videos? I have a 32gig sd card and I really want to watch vidoes on it. Any ideas?