Ubu.com is kind of a meleed mix-tape melange. You can hear Jack Kerouac read his poetry or see Pipilotti Rist's early videos. (Even the entirety of the avant-garde magazine-in-a-box, Aspen, is cached on Ubu.
And UbuWeb has converted all of its rare and out-of-print film & video holdings to on-demand streaming formats à la YouTube, which means that you can view everything right in your browser without platform-specific software or insanely huge downloads. They currently offer over 300 films and videos from artists such as Marcel Duchamp, Vito Acconci, Pipilotti Rist, Jean Genet, The Cinema of Transgression, Richard Foreman, Terayama Shuji, Paul McCarthy Jack Smith, Carolee Schneeman, John Lennon and hundreds more - of course all free of charge.