How did lookout3d make this??!!

I’m guessing this is the bss mod right? And he just pre animated everything and played along? Because that part where the sword pokes out from the pillar you can see he had a short delay when blocking with his sword as if he had to predict when it was coming.

But How did he take damage if everything is just animation? And are you actually able to give peple hp and damage in some way as well?🤔 thank you!