I took seven minutes of video today of employees running around the opening day line at the new Apple Store Passeig de Gràcia. Seven minutes of video was 855 MB. It took me over two hours to upload seven minutes of video to youtube using the local DSL service.
When everybody can upload at non-braindead speeds, I'd expect some reddit-like site to pop up with a video commenting mechanism. Higher throughput decreases the amount of forethought you need before starting an upload and increases the time you can iterate over a heavy (space-wise) project/media/project/subject.