VID-810 Added provider to video_info and Special:Video controller
VID-810 Don't give a default
VID-810 Add in some additional require fields
VID-810 Changes for code review, plus some style/doc updates
VID-810 Added a comment per code review
Merge pull request #1579 from Wikia/VideoSprint33-VID-810

Video sprint33 vid 810