I contacted them and they explained as long as it doesn't interfere with other users and slow down the server. I asked them for ffmpeg path and they said I can install it my self. I only plan to upload small video clips 10 -15 mb so I should be fine. As far as the mod_rewrite is it a file or something I need enabled on the server?

The only thing I can think of is swapping my main domain around with the sub and see if it works because I just realize the channels are doing the same thing. The other tabs are working home,upload,tags,channel.. So wouldn't it be a problem with all if its mod_rewrite?