When I travel, I usually use a Panasonic SD60 high def movie camera, but on a recent flight with Emirates Sydney to Auckland, I used a small Canon IXUS 255.
I bought it because it was small and light.
I was amazed at its 1920 by 1080 results.
You can see the results if you want at the following link (you might to change to 1080p)...taken on an Emirates A380.

http://youtu.be/HdbKAn2wMLA

$A239 in the box!!