Sharnt, I think the reason for that is because the file might be too large. Since each segment of our videos are over 2 hours each and recorded in 720op, they might have reached the size limit.
You might have to download the video separately, and then parse out each fight, where you can then commentate over the video, then upload it onto YouTube.
I'm not 100% sure on this because I ever upload anything, but maybe that will help.