Replace phpfox default video player with JW Player, you could find more information about the player from here. 

Play shared videos with JW Player, supported sites: YouTube, MySpace Video, Break, Metacafe.
This plugin need modify two files of phpfox core as there aren’t any hooks or plugins can be used on current version phpfox script. So when you do phpfox upgrade, maybe the modification will be overwritten, you will have to do it again.

For more details, please click here.