My parents are on Sky Muster in Australia and it works fine for them, we call them a couple times a month and the latency isn't amazing but I've had worse calls with people on DSL.

My subjective opinion was that the starlink was better than DSL and even better than some cable internet services I’ve subscribed to in recent years. The downside of the starlink was that it would sometimes drop out for 8 seconds, but I’ve had cable and DSL that would fail for half an hour. Apparently the dropouts have become much less common in the last year.

I recently used Starlink in outback South Australia. It was faster than most wired internet I've used in Melbourne or Sydney.

Yes, they can do it - my parents have Hughes satellite internet. I've been able to do multi-person video calls from their house. It's pretty low bandwidth though 40Mbps or so claimed I think and something like 50Gb/Month data cap.

It was faster and cheaper to tether to my cell phone while working from their house.

Out of curiosity – why don't your parents use fixed 4G or 5G internet in that case?

Good question. They may not be aware of it. Though I did talk with one of their neighbors who mentioned they had it.

4G and 5G modems can be a really solid solution if you point an antenna at the tower.