There's no contrast between you and the background, which makes it look flat. Actually, the background is better lit than yourself. Besides, the entire scene is way too colorful/distracting.
I'm wondering if you could help me too.
I'm about to start recording my course and some of it will be me talking into the camera. Now the issue I'm having is that I'm planning to have a Batman and Joker poster slightly blurred in the background but I can't find any guide on whether that's allowed or not from a trademark point of view
If you know the answer or could point me to the right direction that would be hugely appreciated.
What's the point of having Batman-themed posters in the background?
I really don't get it, unless your course is about Hollywood movies (which would raise legal questions btw). Distracting backgrounds don't add any value and take attention away from the content you're delivering. Keep it simple and professional.
Bottom line: Don't use copyrighted content in your clips.
It all depends on what you mean by Talking Head. In technical term, the Talking Head is a tiny camera take of the speaker placed on a corner of the main content (usually lower right corner). If that is what you are referring to, then it doesn't matter, as long as is reasonably visible. Its function is not to show your face, but only to improve the connection between you and your public. It's a psychological improvement, but your students' real focus is always on the main content, never on the Talking Head.
If on the other hand, you are referring to yourself as the main content, full screen or so, then things are quite different. In that case, you want to use a Chroma Key approach, draping a green or blue backdrop (depending on what you are wearing), then replacing that in post-production. A good standard replacement is a gradient or a blurred and desaturated panorama, so to enhance the speaker. Using Chroma Key when the speaker is the main content also helps to add callouts and other visual elements to improve communication.