I've just watched the vid again and he uses copper wire to suspend his parts in the vinegar/nickel solution, DO NOT DO THIS, use only titanium wire because the vinegar will eat away at the copper and add copper to the solution and contaminate it.
He also does his vid in what looks like his kitchen, in a cold shed with a large tank I use a 300 watt fish tank heater to get the solution to 30 degrees as it won't plate very well if it is cold. Plating also works better with agitation in the solution so in my large tank I have a cheap Chinese fish tank wave maker, in my small tank I used to stir it with a big spoon, but that gets old really fast. Make sure that nothing suspended in the tank touches anything else, especially the negative and positive wires, common sense I know but it happens

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The patio/Mortar cleaner will completely eat through zinc/galvanise/aluminium even though it is roughly only 22% acid, it will also eat through steel if you leave it in too long. I only use the Patio/Mortar cleaner outside in an old coffee jar or a glass baking dish with a sealable lid for when I've finished with it. The Patio/Mortar cleaner gives off hydrogen gas??? when metal is immersed in it so its best to only ever use it outdoors and put the lid on when you have finished using it.
A pair of Lab tongs is ideal for placing items in the Patio/Mortar cleaner, don't be tempted to just drop things in because it will splash and you don't want that stuff in your eye. An old plastic tub with water and a couple of big spoons of Baking Soda mixed in should be kept next to your Patio/Mortar cleaner (acid) and when you remove the parts from the acid dunk the parts in the Baking Soda tub to neutralise the acid.