Jumpcut
Had some trouble with the Jumpcut uploader (it consistently failed, no error messages, nothing) on a quicktime movie I made with iShowU. However, it handles privacy just as I was hoping. Security through obscurity - not the best security, but works nicely when trying to integrate services that don’t know each other’s users/groups. Here’s my current plan:
Have students upload videos to Jumpcut, set them to private. Click ‘post’ to get the embed code for the video. Copy and paste that code into Elgg. Now the Elgg community can see the video, but it’s not public on Jumpcut.