I have the Apple TV, latest gen, and I can't watch movies on it. I have movies on my hardrive, on the home server, on an external harddrive and it's impossible to watch a film using AirPlay because its so jittery and laggy, it doesnt even look good and its not comfortable. I purchased the beamer app and it's choppy too. It stops, then goes, then stops, then goes. Im mainly watching .mkv files that vary in size. Maybe 15GB down to about 2 or 3GB is the smallest. Should I convert these to mp4 and then add them to iTunes and try airplay? What should I do?