Glad it's helpful! Steeming should be a fun experience. Yes, there's a business side to it, and posts have to get out, but if you can be as efficient as possible, then you can use the rest of your time to enjoy it.
I don't have experience with green screen, but it sounds like it would be cool. I wouldn't mind getting some video responses to my comments. That's a cool idea.
Are you planning on using it for more posts as well? Give yourself a little more freedom when making videos? Or are you thinking just a more attractive background image that's static... like the pictures at the bottom of your posts?
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! :)