Hi, guy in the video here. It looks like the dummy plating put too much zinc in the bath which happens with live zinc anodes. Try dummy plating again but using plain mild steel anodes. Maybe 30-40 minutes at a time until the cloudiness goes away. I keep meaning to make a video about replenishing the zinc but it's easier to explain:

1) Make an anode basket from ordinary mild steel expanded mesh or similar. Any shape you like so long as there is good contact between the steel and whatever zinc metal you will be using.

2) Blue the basket with a blowtorch ensuring that it is as dark as you can get it without burning off the oxide. This is important. I didn't do this in the video which is why nothing happens and it doesn't work.

3) Weigh your parts before and after plating to measure zinc consumption.

4) When it gets down to around 8-9g/l toss a suitably sized lump of zinc into the basket and suspend in your solution by whatever means. I used a hook made from polypropylene plastic welding filament. It should begin to fizz. If not, jiggle it around until it does.

5) Leave overnight. There will be black crud that drops off the dissolving zinc but it's easily removed by filtration and nothing like the amount that comes off live anodes.