Thanks everyone-we managed to upload an .avi and that seems to be playing ok-we haven't done anything else? One of out tech guys says it plays because media player has the correct codec built in-anyway he is going to transfer the video into mpeg 1 which he reckons will play ok and is smaller than the .avi It's quite a long video at 23 minutes but he says there may be a slight quality loss-any suggestions? Thanks in advance.