https://www.youtube.com/channel/UC6ZZhovRZpUA4VafgBdECZQ
The official Youtube channel for the NSK. Entirely in Japanese but lots of exclusive content, and genuinely worth subscribing to. The content is improving with time too.
https://www.youtube.com/channel/UCLtOECZPTHBnR6X6Vg06LDQ
A new English language channel fronted by NHK commentator Hiro Morita, with official endorsement from the sumo association. It will be focusing on tournament coverage, info on the rikishi and details of the history of sumo.
https://www.youtube.com/@futagoyama-sumofood
The official Youtube channel of Futagoyama beya. A few other heya have Youtube channels or other social media accounts, but Futagoyama are really pushing theirs, with a cameraman following the guys around and, most importantly for overseas fans, English subtitles on every video! There's some real characters in Futagoyama and this is absolutely the best behind the scenes footage there is, 100% worth watching.
https://www.youtube.com/channel/UCIk5AQ47TYq8PQRoeM47LqQ
Commentary, news and match analysis videos. Remember to take his opinions with a grain of salt; just because he talks about something doesn’t mean it’s true or noteworthy.
https://www.youtube.com/channel/UCClMvLPowPLwZ-YrYo4ybBw
Videos about individual rikishi, or specific concepts in sumo, as well as interviews with some rikishi.
https://www.youtube.com/c/DonDonSumo
Compilations focusing on specific rikishi, techniques and matchups.
https://www.youtube.com/c/WorldOfSumo
News, interviews and podcasts about sumo.
https://www.youtube.com/c/SumoParis
Lots of old basho highlights, classic individual matches and sumo history videos focusing on specific decades and eras.
https://www.youtube.com/channel/UCKe3bItGoXnvK1QCMGJSU3A
Русскоязычный канал! A Russian language channel with commentary, translations and bout compilations.
https://www.youtube.com/channel/UCde9-OrkCgQevTTvKf-Ppmw
Videos of a lot of older basho.