Was not sure if that was fighting or bees just struggling with a dead bee. Sometimes they get their legs hung up and they really struggle to break loose, giving the impression they are fighting.
I thought that also but I was watching the bees on the ground for a bit and they were attacking it. I was so fascinated. That I didn't film it. Then I realized I should film this and by then the bee was dead. It may have been close to death when they were taking it out.