I have playback problems in all video files in the phone, the ones that came with it and one .avi I've added.

They lag a lot, and especially when there is lot of sound happening on the video. When theres little sound, like crickets making little chirps, no lagging. But when orchestra starts playing, video freezes for seconds. Also I found that when you turn the sound lower - less lagging, no sound at all - no lagging.

And I recently hooked up the phone to my TV and played the videos and no lagging what so ever cause the phone didn't output the sound itself. Anyone met problem like this, or can point me in a direction to get this solved?