So .... when you download HD (5gb) movies from iTunes ... they play just fine. But .... when I load my own movies of 4+gb (MKV file), using a video player such as VLC ... video plays but no sound or it doesn't play at all. Also .... many of my MKV files have more than one audio tracks. What player will recognize that and allow me to pick a track I want to play? Someone suggested converting MKV file to MP4 as iPad likes those more. I fund software and it's taking 5 hours to convert 5gb MKV to MP4. Will it help??? thanks.