I thought it was just a good tough baseball play. Runner didn't think there was a play, so he didn't initially slide, though he tried to eventually. Catcher did drop his shoulder a bit but I give him the benefit of the doubt because he has to brace for a collision. The batter-runner is the kid who really escalated things, and I believe he deserves a much harsher punishment than anybody else for his totally unprovoked hit on the 3rd baseman. 3rd baseman was acting stupidly as his head totally left the game, but that's what people do when they they get upset. I have never umpired on the 90' diamond so my opinion doesn't mean much, but I would kill that play as soon as I see the catcher flat out. He needs to be seen to, and the offense isn't being penalized much, as it was a solid triple, not a HR.
F5 caused the whole situation by playing the ass. The hit on him was not unprovoked; he was starting a fight with R2. Of what I can see, F1 is the only one that I feel should definitively get a multiple-game suspension (he's the only one I can see actually fighting.)
Also, injury is not a reason to kill the play, unless further play jeopardizes the injured. Not really the case here.
Interesting how two people can watch the same thing and see something totally different. I watched it again and F5 - #19 was indeed jawing at R2, but his hands were always at his sides up until the point of the second collision, and he never made any contact (perhaps thanks to the PU) with R2 or anybody else. After the collision he gets out of the area and heads back to the dugout while everybody else convenes by the plate. BR, on the other hand, blind-sided F5, who he could have easily gone around. How you figure that was provoked is a mystery to me