Nice. I had the same idea and now I see it done without lifting a finger.

I could not make it work to watch a session from my vscode in steamos (it could be misconfiguration from my part), so I don't know if you can alter the speed of the reproduction from there, which would be great.

From my inexistent list of improvements, make it so that 2 video sources can be sent simultaneously, one for the speaker, another for a presentation video. That way you can see the person doing the course, while seeing the important bits, and see the code.

Thanks for checking it out. I'd be happy to take a look and figure out what's wrong if you could please drop me an email or open a github issue.

That's a good idea, I'll work on the overlapping video tracks.