So, first, again, sorry about that. It was when youtube had changed to its new format and I made a dumb mistake. I feel dumb about it.
Second, I think you should release your arena battles for others to play with. Then you can put youtube vids in your pmc submission for it. You could really make them customizable like maybe use redstone to make it super customizable. I'd think it would be especially popular on servers. You could set up redstone relays that could be used from the arena and/or from a viewing platform. Using dispensors with eggs or monster spawners and buttons or levers to release a marked amount of different monsters. That way you could make it so you could fight monsters or do like in your vids where you have golems fight monsters. You could even use relays to change the battle grounds like add lights for nights or remove parts. This could make for an awesome gladiator coliseum.
And if you don't want to, would it be cool if I tried to? I'd like something to break me from my one continuous build I'm working on, and your fight idea is really cool I think. And of course, you will be giving the proper credit's because you originally gave me the idea. (Because of the malware problem on pmc I can't search to see if it's done a lot by others. darn)
p.s. I have subscribed to you. I think you have good ideas and I think you'll keep coming up with better and better ones.