I had an Aqua-Vu camera several years ago. Although they’ve probably gotten better over the years, there are a few things I found out about using one that convinced me to sell mine.
1. Unless the camera is very close to the bottom, there isn’t much of anything to see. From the surface to within a couple of feet from the bottom you will see nothing but a blank screen.
2. Every minute you spend looking at the screen, or trying to use it, is a minute you aren’t fishing. A depth finder is on all the time. You can glance down and see overall depth and any structure under the boat. With the camera, you must control the cable to position it and you’ll only see stuff that is less more or less 5-10 feet away. Then you’ll wind up the cable and go back to fishing.
3. Most of what you thought might have been fish that you marked with your depth finder, are not fish when you use the camera.
Overall, I never saw enough to help me catch more fish. It was more of a distraction that took away from my fishing. It is interesting to play with, but a half-way decent depth finder will give you enough information faster and in a much more convenient way that can help you catch more fish.