Make your own recordings public:

Would you like to upload your own recordings of sheet music on Musicalion? We would be delighted to have them.

You can post MP3 files of your recordings or videos on Musicalion.com that you posted on youtube.com.
You can produce a recording by using your computer. In every Microsoft operating system there is a program called "audio recorder" under "Accessories-Entertainment Media." If you have a sound card in your computer (all the newer ones do), all you need to do is plug in a microphone and start recording.