your point makes sense but you can clearly hear him say ill hit you in the face again. theres likely incidents that have happened between those two. whether or not it happened in that video is another story.
the girl just posted on her account that she meant to scare him and she was hitting him in the video. thats fine if true then why did he say, you want me to hit you in the face again?
hes def the problem but reports are that they had issues going back to before this recent incident. nothing came out of the first incident, but if you knew that this relationship is toxic, why stay in it?