>>234351
>>234357
Seeing traditional training methods is part of the draw for more dedicated fans. Some stables literally sell tickets for those fans and tourists to watching morning practice. Nobody's going to buy tickets to watch sumo athletes do modern weight training, because they're not professional power lifters so it's not as impressive. So for these YouTube channels, they're using them as advertising, which means showing off the stuff people can pay to watch in person: traditional training leading up to bashos.