A friend of mine had a small flat-bottom boat like that. It was ok for two people in calm conditions. I wouldn't have trusted it beyond that. I've done a LOT of wilderness canoeing, and would pick the canoe over that type of boat 8 days out of the week.
Last I heard, he was talking about cutting a hole in the bottom center of the boat, and attaching a live trap under the boat, so he could use it as a live-well.
I think he got the idea when I told him I wanted to cut a hole in the bottom of one of my canoes and put a piece of Plexiglas in place for a glass-bottom boat effect.
I think my idea had a better chance of success. Then again, I sure wouldn't want to discourage someone from trying out their own ideas...
Great link to the video though. It's lit the fire under me to get to work a the canvas or cedar strip canoe I've always wanted to build.