Sorry to disappoint, Kat - Soundcloud is purely for audio files. I use it as a repository for audio-only recordings - and to embed those recordings in web pages with a nice player as in:

Will & Wolfie - audio page

We just wanted to get some tracks put down quickly for the website, so we let the recorders (twin Zoom H2s) roll for an hour and played what we could in the time. I did the lash-up on my Mac the same evening.

Videos later, perhaps...