LiveBarn has video cameras and microphones at ice rinks, pools, basketball courts, playing fields, etc. - mostly in the U.S. and Canada. AFAICT from promotional videos, the resolution is 4K. I don't know if you can identify faces.
People who subscribe can watch games and practice sessions. The cameras are on all or most of the time, except during sports blackouts by leagues like NHL. (You can see some NHL practice sessions.) To some extent you can even watch video on demand. LiveBarn installs the video cameras for free, and pays the facilities a portion of subscriber fees.
In most of the U.S., videos are legal in public facilities, and help deter crime. Not sure about microphones. But these could also be used by stalkers, thieves, as well as people seeking to learn sports opponents' skills, weaknesses, strategies, skating programs, etc. I don't know whether skaters & coaches wishing to black out their private practice can negotiate for that.
Does any of this bother you folks?