One thing I've found on YouTube that I've found I like a lot more than I expected is bassoon quartets. With all due respect to Jake S., if I'm going to listen to an instrumental of Bohemian Rhapsody it's probably going to be this one.
There's also four women from the Eastman School of Music in Rochester, NY, who call themselves the Breaking Winds Bassoon Quartet. Here's a medley of Lady Gaga songs and the next post down will be the Chinese Dance from the Nutcracker.