I would use it for posts and answering comments yes. I would also use it to make encouraging videos when the weather is bad or whenever I feel like it. That would give me a little more freedom since I probably won't do much or any post editing.
As far as the background of the green screen videos I would use something like that yes. I am just experimenting with all this because it is so new to me. Just trying out new ways to release content.
I think it's a great idea to pursue new ways of creating your content. You might find that something else works really well and just continue with that. I hope it goes really well! :)