No, it's not a supply problem, it's a government subsidy distorting the market problem.

Get rid of government subsidies for education and let people choose what education they get, where and when. You'll quickly find plenty of willing, able and capable teachers.

While we're at it, get rid of minimum wage laws so that people who don't want to pay to learn, can do apprenticeship programs and instead get rewarded for their efforts.

I can't remember a single person I've watched on youtube educationally. I hate it - it's too easy to get distracted. When I'm in class, I can focus. On my computer I'll end up somewhere else and right quick.