I teach a course in studio pedagogy at The Education University of Hong Kong. This spring, students in the course spent time identifying interesting or exemplary videos for learning piano or guitar. Some are excellent in terms of multimedia use, or visualisation, or simply presenting or explaining a musical concept or piece of repertoire.
Below, you can find a playlist of 29 of the top videos, and here is a PDF with student analysis of the Top-rated YouTube music teaching videos.
Thanks Matthew, I found this useful. It gave me a few other idea’s for music lessons to do a review of.