I am very new at this so please be patient. I have a GoPro HD video sport camera. I use it to film motorcycle rides. I think it does so in the MP4 format. I have been sucessful downloading videos to metacafe and sharing them. I am now ryig to learn how to download music to the video clip and I think I have accomplished that task. I do this in I Movie. However,after I finished with the video in I Movie and I go to metaafe to upload it rejects the format, looks like it is in a mv4 format, I get a rejection email saying it is in the wrong format and it gives suggested ones. I think the format was ok before I went to I Movie to add music and now it looks like it may have changed. Can I change the format, how and did I do something wrong? Thanks.