Is your feature request related to a problem? Please describe.
I don't really know the topics of each video, so It takes a lot of time just to click on each of the video to see what they're about. Some lecturers also upload their lectures and exercises together so it is very confusing.

Describe the solution you'd like
May be an additional button to view and edit a personal note on each video. This can also allow the lecturer to describe the overall topic of that video (e.g. Lecture 10: what is AI) and students can also add some reminders of their own such as "Need rewatch". We can reduce the memory required by limiting the number of allowed characters.

Describe alternatives you've considered
A clear and concise description of any alternative solutions or features you've considered.

Additional context