Nice vid Jakeland. That's a classic behavior described in the texts where a mature buck mock battles with a subordinate buck in a playful manner. They have classic body languages associated with the ritual, if I remember correctly. It's kind of like big brother teaching his little bro how to be cool. The little one is probably the one that enters the clearing first when it's time to feed (and gets his ass blown off by the hunter who didn't realize there were two bucks coming in). I posted one like this last year from a trail cam in my back yard. Fun to watch for sure.