Developments during the recently completed Nagoya 17 basho:
Sherming9 (Vaughn TV) remains the most reliable live stream of the NHK audio and video coverage. Coverage is beginning at 3:10 PM JST in mid-Juryo. News events or political activity may preempt the start of sumo coverage. Something new is that adding a /old to the end of the URL for the sherming site brings up what seems to be an older version of the site software. This may be an alternative if the main link gets froggy. The Sherming site includes a live chat that is used by some of our forum members.
qq remains a viable choice for live streaming of the NHK video coverage. Audio coverage remains a mixture of Japanese and some Chinese commentary. The daily start up time is unpredictable. Makuuchi is always covered (even if news or political activity preempts sumo coverage on NHK/Sherming9). Coverage may start anywhere from early Makushita (1:30 PM JST) to mid-to-late Juryo (3:30 PM JST).
UBS has gone to a full subscription service which does not seem to be available outside Mongolian; however, there is now a UBS Stream service which provides login-free access to the UBS signal. Sumo coverage still starts at about 4:10 PM JST and is limited to Makuuchi only. It provides the NHK video signal with Mongolian audio commentary. The video signal seems to have a lower resolution than the Sherming and qq streams.