I fail to see why you are trying to playback 720p videos on a 480p display with digital 5.1 sound on stereo speakers

Even with the TV out, you will still get a stretched and pixelated 800x480 out on your 1920X1080 screen (3.5mm jack does not support HD out) and of course none of the digital multichannel sounds (3.5mm jack does not support Dolby or DTS out either)

With 480p videos you get 6 times as many movies in your storage, as 480p videos are a 6th the size, and exactly the same quality on our 800X480 displays

So... you are leading your device to a very probable reflash or worse, for a chance to achieve absolutely nothing?