150mb is nothing, but that is of course provided that you do manage to upload a video and not get a "format not supported" even though you have tried several formats that are supposedly supported.
Just in case anyone else has the same problem i thought i'd let you all know that i fixed this by converting the video file to .mov format which is the macitonsh/apple format. I guess the iphone users are more important to cater to than us pc users.