Thanks for the reply re the yt channel, that's a shame as I'm sure you could package some of the content esp the physics ones into a course, I'd definitely buy that. There is a market for intermediate level training material that I've seen executed here and there, some examples are https://www.youtube.com/@DmitrySoshnikov-education/videos, release some free content from a course, hoping https://www.youtube.com/c/LowLevelJavaScript/videos does something similar in the future. Cheers and all the best!