Doedo Shipper has been experimenting with inflight video using a completely self-contained camera that can be found for well under US$100:

Gail and a friend having fun. this was made with a $100 lightweight small atc2k camera that was mounted with a ty-rap an a lot of black tape.

http://www.youtube.com/watch?v=f2RrCtuqykA

It self contained, no wires anywhere.  It records on an SD memory card for an hour and edited with Windows movie maker or iMovie on a Mac. By far the easiest and cheapest way to get some video. You turn it on and just let it run for the whole flight.

Doedo