I downloaded bittorrent to share my new movie trailer with everyone to get word out better. The application pops up and I click Add on top however it won't let me add the mpeg4 video file. I've tried going online and changing it to a windows, avi and webm file, but none of them are still popping up. Is there a particular video file you have to use for bittorrent, not familiar with the site, or am I just doing something wrong. Thanks for the help in advance.