Really cool idea! I would just like to add that I use YouTube a lot and I have several channels. Sometimes YouTube has a tendency to delete videos that are just a few seconds long. I don't know if it's part of their algorithm to detect spam or what. In the past a lot of online marketers were uploading 5-10 second videos and just showing their website links and pulling some other hi-jinks and so I think that's why that happened.

Anyway, I don't think it's a problem at all with Vimeo, and I don't think you will have a problem with YouTube if you keep your video unlisted. Anyone with the link can still access the video, it is just not listed on YouTube. Normally they leave these alone even if they are only a few seconds. This is just some info I have from my past experiences, so I wanted to share it.

I think this is an AWESOME project and I will definitely be participating! RESTEEMED!