channel of USC's music school, which has tons of great videos on everything!
There are interviews of teacher, alumni; classical, rock and jazz concerts of students and teachers, etc.
Videos talk to musicians at various levels of their career, from high school students considering music schools, to college students, all the way to high level professionals. It's a great resource, particularly for those days where you need an extra push for motivation and inspiration.
this one on conducting by Larry Livingston, where he talks about the main qualities needed to be a conductor, and about the balance of technique and musicianship.
one is by violin teacher Eudice Shapiro, who talks about studying the viola in addition to the violin.
here about the importance of knowing yourself to make great music.