Full course: Special relativity and steps towards general relativity:
https://en.wikiversity.org/wiki/Special_relativity_and_steps_towards_general_relativity
I'm willing (if someone expresses a serious interest) to do videos, though I would record them independently of the live lectures with students, to avoid having to edit out discussions with students or keep them in and handle privacy issues. There are also context-dependent explanations that are OK locally but don't make sense planetwide.