I really enjoyed these, but I'm not well versed on sumo. I watched the Intro video, and I hope you don't mind some questions!
Does the Shinto guy (priest?) have a role like an umpire or referee? I noticed that one of them shouted through the match.
Nobody had more than ~15 Wins+Losses. I take it those were their records in this tournament, rather than career?
Are wrestlers generally expected to only use traditional techniques? There doesn't seem to be that much variety in technique. I saw that there are a number of recognized WINNING techniques.
Is (western style) sportsmanship not practiced in Sumo, or in Japanese sports generally? I would have expected them to help each other up. Is it not allowed or a tradition of the sport?