After a bit of research and messing around I have found a great player that can play .mkv 720 and 1080 flawlessly on the iPad 2. I have not tried the iPad 1 but it looks really good nonetheless. May I suggest using iPhone explorer for Mac & PC to easily drag and drop your video files to your iPad. http://www.macroplant.com/iphoneexplorer/ So the player is XBMC player. Go to Cydia and add: http://mirrors.xbmc.org/apt/ios/ Download XBMC player Use iPhone Explorer to create a folder in var/mobile. I created one called Video. Once you copy the video files into the folder you created select the video tab in XBMC, then select add video, select Home Folder, select the video folder you created. XMBC is a very powerful media player / streamer and I don't know all the options but the HD playback, even at 1080 encoded movie is fantastic. Tons of options as well. You will notice that the application has been ported to work with iOS but there is no swiping and such. It uses the touchscreen to select the mouse click. This is not ideal by far but the benefits of HD playback far outweigh these pitfalls.