Very happy to see more tools like this. There is so much potential for interactive tabs and sheet music with YouTube videos.

I only found out about https://www.soundslice.com recently. I'm not sure how it managed to evade me for years of searching for music resources on the internet... but for anyone interested in sheet music, I can't recommend it enough.

The design of the whole platform is so minimal and beautiful, and having notation synchronized with YouTube is simply brilliant. Built by one of the co-creators of Django, too!