I get the same problem with some videos but I can usually get them to play by pausing and resuming a couple of times. Happens different with different players, I think it might do it less with it overclocked further. Sib uses mplayer I believe but it still seems more likely to play than kmplayer or the built in media player. Sometimes my video pauses when I lock the screen while playing a video and I have to unlock the screen, pause it, resume and then lock the screen again. I lock it to save on battery and not have the distraction of the phone showing the movie next to the tv.