Update: I just tried a 1.4gb file and it would not load properly, it went through all the motions and showed that it had uploaded but would not do the 480conversion etc. and when I pressed the "submit" button it said you must upload a video to do that! Wasted a fair few hours with this!. Tried about 5 times. Then tried another video of about 600mb and it uploaded fine.... why is there no answer to this question of file size limits!?