Right now, the only sources I know of that provide English-language coverage:
1) Jason, who is an American teaching in Japan. He posts videos on his Youtube channel of select matches and includes his own commentary. I enjoy his take on things. Here's video of a couple of today's bouts:
Here's Hakuho's 1st day bout:
Hakuho is the best sumo wrestler who has ever lived.
2) Kintamayama has been posting the daily digest video but may not continue that now that NHK is planning to provide English-language coverage on Youtube. He does have a video for Day 1:
I love his commentary and the humor he includes.
3) NHK World's "On Demand" Youtube channel has begun offering a daily digest of the upper division matches which includes English-language commentary. Theirs was still not posted as of 8:00 PM CDT. Here's their video explaining the rankings in sumo: