Sorry if this is posted. A forum search didn't yield any answers. I just got pulling some vids off of youtube and converting them to mp4s via iSquint. I wanted to play them in Quicktime before putting them into iTunes to make sure they were ok and to trim away some of the fat. However, Quicktime will only play the audio (only an audio window pops up, not a video window). However, when I put them into iTunes, they play normal. I checked all my old videos to test it as they have played fine in Quicktime in the past but the same thing happens with them. And playing a .mov file was normal as well. I have no idea what the hell is going on but it is rather annoying. Any help would be greatly appreciated.