Youtuber or livestreamer
Because Youtube limits the bit rate. Everything looks so cheap there, not at Twitch.
Mixer & Twitch via Restream.io
Exactly you
Your opinion.
Let her do what she wants
Oh there are enough that handle it very well. At least some of them understand what implementation, planning, and so on, and run it as a successful business model.
In terms of content, of course, the one does not like the other.