I love YouTube.
I'm in the Halftime Band at church, and many of the songs we sing I am not familiar with. So, I have to try to get up to speed on them very quickly.
To do so, I go to YouTube, enter the song name, and listen and/or play along. This certainly helps me develop an ear for the music, even if what we finally do with a tune is not exactly what you would find on the video.
Just recently, I bought a ukelele, and, again, I am turning to YouTube for help. I've already learned several songs by watching Ukelenny over and over again.
So, I can vouch for the fact that if you're trying to learn some music, YouTube can be your friend.
Just this week, the library added Mango language instruction to our website. Our hope is that our patrons can go to Mango and, as with YouTube videos, learn another language over time.
This kind of instructional approach certainly can't hurt.