These are intel iMacs (2 years old...can't get the specs at the moment). Currently playing 1280X720, 15fps, H.264 just fine. Using larger, less compressed codecs was the best practice with Multi-screener as well as when using Quartz for sync playback.

I just found ArraySync and bought my first copy for testing. I'm excited about the potential because I haven't seen anything like this since Multi-Screener (out of date and no longer updated). ArraySync handles HD video pretty well but in my tests (4 imacs on the same wired network) there is a ...