I don't have any information or context to provide to help you make sense of how this video came to be. The best I can do is this message board thread that has live play-by-play of the action, but it isn't necessarily all that helpful. ("No one in the crowd. Including us, know what the fucks going on. Before you start shouting 'staged'. I can confirm they arnt. The fights are SO bad that they couldn't possibly been choreographed.") Anyway, I think that's for the best. You should be able to enjoy Spider-Man beating the absolute shit out of Batman and Robin without having to think about what you're watching.
Seriously though, Batman and Robin get their shit wrecked. You would think that if anyone would know not to spoil their advantage by using the movie-goon wait-for-your-turn fighting technique, it would be these two.