If there was a group of 4 people singing, it could be turned into a choir.I heard that, due to irreconcilable creative differences, they have split up!
Normally those videos are made up of several windows, not many people all in the same room singing together.during lockdown, a friend co-ordinated about 12-15 voices of the church choir all recorded in their homes, so that an online ‘choir’ could be broadcast. I don’t know if he used any software, but it was very time consuming!