i think it's most likely that the person who recorded this did him dirty and sent it to people.
ultimately their face isn't in the mess , only his.
i'd say it's less likely that someone in his neighborhood was browsing myvidster and just happened to stumble across this out of millions of videos sfsfsffs
these boys jumped him because their reputation and masculinity was threatened by one of their own being on cam sucking on cock.
this was their way of publicly separating themselves from him.