What you have here is garden variety Jewish racial incitement. Someone posts video of blacks and whites brawling and sees that the first person to throw a punch was white, Jews and their shabbos goys see this post, recognize its propaganda value and run wild with it, trying to make it go viral.

The white dude that threw the first punch might have been in the wrong, it's impossible to know for sure without more information on what was said, but the blacks that piled into the fray did so for primarily for one reason. They saw a different racial group attacking their racial group and so jumped in out of solidarity and probably some racial animosity towards whites. You then had the usual whites who saw an opportunity to conform to the Jewish social power structure and virtue signal by automatically siding with the blacks, and of course Jews themselves who then use their massive media influence and astroturfing infrastructure to mobilize racial incitement and self hatred among whites. This non story then gets turned into the latest evil whites innocent blacks and the noble white cucks who come to their defense narrative.

Reddit Shill/trolls like nasser/salos/radicalcentrist then go to "right" leaning forums and try to gauge their reaction in order to gather intelligence for the growing propaganda campaign surrounding this video, and to gloat and demoralize. This is how this kind of shit happens. We've seen it a thousand times before at this point. The Jewish elite just sit back and enjoy the show, like Jerry Springer smiling backstage while a goy cattle mob he incited brawls on stage.