Perhaps your eyes are better than mine but I’ve watched it several times and I cannot see any contact.
I watched the video as well. I even took the time to pause till see if there was any contact.
I didn’t see any contact.
It doesn’t take much when someone clips you from behind in full stride. Watch the white girl’s right foot just before the black girl goes down. I think she made contact with the black girl’s trailing foot — not much, but enough to throw her off balance. Admittedly, you can’t really see contact from the camera angle, but it’s a reasonable inference from the way the girl went down — as well as the instantaneous way she jumped back up for the fight. The girl thought she was tripped. That doesn’t excuse her reaction in the slightest, as incidental contact is part of the game.
I wonder what the score was at that point and whether the game had gotten out of hand.
I also imagine number 5 in blue has some apologizing to do, for standing there watching her teammate get punched out.