Here is a scuba diving video I filmed with a GoPro Hero2 and of course edited with Kdenlive:
Underwater, colors fades to blue/green, so I tried to fixed them with some filters directly in Kdenlive. Details of the color correction process can be found here [2].
Links:
[1] http://kdenlive.org/forum/users-forums/kdenlive-theatre
[2] http://kevin.deldycke.com/2012/11/20m-scuba-diving-pool/