I shot an underwater video on Lake Nipissing last winter. It took some time to setup for sure, Nipissing waters are very dark and murky. You will need a light on the camera. Also avoid bouncing the camera on bottom it will stir up silt and it takes about 5 minutes for the silt to clear (where I was fishing anyway). The camera I was using was my buddies, I believe it was an aquaview with 100ft cable. Here is the video and pic of camera I used.
[YOUTUBE]https://www.youtube.com/watch?v=nHO9ATya2oc[/YOUTUBE]
https://www.youtube.com/watch?v=nHO9ATya2oc 