I have the Dingy Lift option and didn't realize that leaving the dingy attached to the lift I couldn't get the lift down far enough to remove the engine cover. Of course the boat was on a rack when I discovered this and I believe the only way to get the cover off requires putting the dingy into the water.
I like the solution in the video, but like AGLyme I'm curious about the amount of effort required and the number of people needed to safely remove the dingy and then return it to the rack.
As for being able to see behind the boat, I'm planning to use an RV trailer backup camera and display. With the Dingy lift it is difficult to see well when docking aft first and when trolling. Just have to determine the right place to mount the camera.