Create a new feature For Pro Users

i have been asked by many of my users to have an option for a channel to go private so only people on the channels friends list can view the stream chat or usercams with and on or off switch that only the channel owner can turn on or off at there choice if turned on then no one apart from users on the channel friends list would be able to see the stream chat or cams if turned of anyone can watch the channel i have added what i want people to see on a channel if this is turned on the image below would show over the videoplayer, chat and all cams basicaly cover it all up unless your already friends with the channel maybe have a button like on pic to ask to join the room