An app for live stream training

Its live stream personal physical training at home. The app needs to be able to cater for multiple users at the same time. Almost like group skype but I would the members to have the option to focus only on me and not on other members. Also, I need to be able to talk to one member at a time as well as all at once (Have the option of both) Possibly different camera angles. Unlike group business meetings on skype (head and shoulder camera angle). I will be moving around so I would like the option of different angles. A login to the app would be great as well!