Honestly, it didn't enhance the tank. Other than covering up the wires from the powerheads and tank heater it didn't do anything and made the tank look dark in a room with a fair bit of ambient light.Aside from the vid problem, you don't like how the backing enhances the tank? Any case, your tank you should do what you like best.
I tried a Black Background and it looked like crap. Corals and Fish didn't care for it much either (My Frogspawn and Hammer were visibly retracted despite no other changes at the time and the fish struggled to adjust to it and spent more time in hiding) and since it is in a somewhat brighter room the darker color brought out the absolute worst glare which made it very difficult to film. It is Blue on the other side of the black background and I might try it at some point but for now I am happy as is.tank looks good though. Personally I'd do a light blue background if you don't like darker, but hey...it's your tank!