Obviously I'm new to wpmudev, but I'm really impressed with the work you're doing here.
Anyway, one of the things mentioned in your blurb is that if we need something specific we should let you know. So here goes...
I want to let my members upload videos to the websites youtube account. I have found one old plugin "youtube uploader" with some mods found here "http://wordpress.org/support/topic/can-youtube-uploader-plugin-allow-the-sites-users-to-upload-videos", but thought your team would be able to turn it into something really slick and usable.