His son was losing, but he wasn't getting ground and pounded or stomped out.. he wasn't really in immediate danger.
I mean he might of ate another punch or two... but thats not a situation where you go 0-10
Plus, like I always say... you dudes that aren't about that life never seem to factor in the other elements at play.
Whoever is holding the cam is comfortable with the son being beat up, so the guy winning the fight might have back up there that were just watching them have a fair fight. At one point dude holding the cam calls the name (Will) of the dude winning... so those are his folks.
Nobody is yelling or anything... the situation can be de-escalated by the parent trying to scale it back.
If he instead hops in, against a kid, all sorts of shyt might happen. There would at least be a part two tommorrow when the guy winning shows back up there with his own pops or uncle and they are looking for the dad.
So asside from the high pitch voice... dude seemed to be proceeding correctly IMO.