Looks like gametrailers def no longer works fine. Now most urls there have game name in url like:
http://www.gametrailers.com/video/vs...smash-up/56351
http://www.gametrailers.com/video/re...-turismo/56347
Same foe user movies:
http://www.gametrailers.com/user-mov...an-gt-2/164801
and current definitions don’t handle it well

looks like it need to be updated. Since it only support urls like:
http://www.gametrailers.com/player/56351.html
I was trying to fix in my self but I’m not to well with Regular Expressions