Adrian Miles' first axiom of network video:
legibility is more important than the representation of movement.
Which means that over the web when we have to decrease the size and resolution of video we should also lower the frame rate instead of trying to jam 24fps down the wire. How low can the frame rate go?
...1fps with a continuous intelligible soundtrack.
why only 1fps? because people are much happier people when what they see is able to be seen. who cares if it don't move much? at least you can see it. this works for all content. and more importantly 1fps works over a domestic modem right now.