I have a lot of video of these sort of events, local, mostly out of Busan where I lived.
The only thing I will say negatively about all this sort of event is the safety issue. There just aren't many rules or guidelines that are adhered to.
As well with rules so lax and with so many systems floating around (many made up from ones background and military training); you don't see the really talented competitors get the exposure. There is a lot of hidden talent in the small, market, third story building dojang, sadly most are confined to their group and don't get a chance to shine...as many want to do.
I trained with master Kim Jon Hyun (not throwing names around...no one likely heard of him

); I have him on video doing backflip somersaults, kicking the target of a guy standing on a chair....something he routinely did without thought. He is young and wanted to develop his English ability, his dream was to set up in the US and teach.
He now sells meat on a stick at Bugeon market in downtown Busan....