You want to stream but don't want to have a camera on all the time or maybe at all. You still want that feel on interactivity so they can see you chatting.
It isn't quite a V-Tuber but a PNG-Tuber is an option.
View the gif here: 
https://cdn.discordapp.com/attachments/461381658117931008/970071843748843610/30-04-22-png-tuber-yuna-LILYFIE.gif