ElAmargo:
is your cron running - make sure of that first. make sure you have the FFMPEG.exe (it is supposed to be an .exe file even if using linux. the .exe really means nothing) file uploaded and proper permissions. With working cron - you should get an email with the error and reason for video upload fail. Also check php.ini for upload size limitations.
Professor, I've never dealt w/ cron jobs, but I just added my e-mail to the cron setup and a few minutes later I got this e-mail (I guess queued from yesterday?):
Failed loading /home/xvideos1/etc/ioncube/ioncube_loader_lin_5.5.so: /home/xvideos1/etc/ioncube/ioncube_loader_lin_5.5.so: cannot open shared object file: No such file or directory
Doesn't help me much though, so I guess I'll contact tech support :-\