A couple questions about backing up movies: 1) Why is Handbrake's iPad preset only go 1280 x 720? It doesn't appear to use the full resolution. At the very least, 2048 across even with letterboxed movies. What settings do you use? 2) I have some MKV movie files I want to play on the iPad. Is there an app that plays them or do I need to use Handbrake to convert them to MP4?