One thing I'd change from a marketing perspective would be that in the video loop the tutor would also have a keyboard at their hands. Because usually it is like this, that if the tutor wants you to hear your mistakes, it plays the improved part which you had wrong by putting extra emphasis on the correct part while explaining it.

The video loop, as it currently is, makes if feel YouTube-y or a formal, business-like Zoom call, while the really special thing of this very interesting platform is the connectedness of tutor and student.

Awesome platform!