You can find the Riichi Mahjong Central here.
You can find multiple blog posts about Mahjong strategy by clicking here. The Riichi Mahjong Central is also planning a Youtube video series.
Kenji was in Chengdu, China, representing the Riichi Mahjong Central and also refereeing the tournament and translating from Japanese into English. He made a 15-minute video of the 1st World Wellness Mahjong Open 2019 – You can see it by clicking here.