Most programs inlcuding GP cinema have a built in option to turn on overclocking. It is not permanent, its different for every program. Change it as many times as you want. You can watch mostly anything on it, I watched a clip of a fight scene from reloaded and found it watchable. Since the gp32 screen is so small, things look a ton better on it compared to your tv/pc monitor. The sound is pretty much fine, if you use low quality video options your video will be more pixelated but take up less space, sound will be crackling if you set it too low as well. There is a good guide for setting it up that should help you find good middle ground. The quality is pretty impressive id say.