I tend to just use youtube for music, but the other day i was watching old black and white cartoons and mindlessly clicked to a Barefoot Gen hiroshima cartoon and have hardly slept since. But I found this and so youtube is still pure win in my eyes:
Koko the Clown sings "St. James Infirmary Blues" in Betty Boop's Snow White

I use it a lot, like everyday 24/7. As soon as I get home I'm on YouTube.