Do you guys have nay idea on how to check for my competitors backlink for the oyutube video if he has any

the only way i know is to paste raw url in google and look at search results but that doesnt give out the total backlink that he might have built for it ...any other idea ??

Also when i was googling i found many people say that its a good practise to submit video feeds of youtube video so i made an xml file and put the necessary tags etc made the feed ..now where do i submit it ?

The only backlink you get from youtube is in your channels "Website:" field and the URL that you put there.