I'm not going to watch a 30 minute video on the system. But I do have it on my Expedition MAX. I've set it up to work with both my boats. Only used it once - when I went out with a group of people, and no one was comfortable backing up the trailer to retrieve the boat at the launch ramp.
The system worked well enough to have someone with limited experience successfully back down the boat ramp.
Spend anytime at a boat ramp (or honestly a campground), and you quickly see there is a real need for a product like this.