[marktwain]

I did not see any video of the fight at the link. Maybe it is there. I did not see it.

So, you have an apparent teen, of indeterminate age, who may or may not have started the altercation.

We do not know who is at fault, or the size or athletic condition of the minor.

An "escalation" indicates something was already in progress.

[NorthMountain]

There's video "out there".

Here, for example.