Ever heard of a "Sochting Oxydator"?
https://www.amazon.com/gp/product/B001B5X6AE/
I use them in my shrimp tanks to slowly add h2o2 to the water in a very controlled way. There's not much info out there about them, but I heard some good reports from other shrimp keepers, and h2o2 treatments have been quite good for my shrimp tanks, so I figured I'd give them a try when I saw them on specials offer. I added them to my tanks at the same time that various other things came together (good shrimp stock, mature tank, right food, stable water conditions, etc, etc) so it's hard to say how much or little they added to the success of the tanks.
They certainly did no hard at all that I have been able to detect. I have the "mini" version linked above which is rated for tanks up to 60 litres. My tanks are about 11 litres so I use only one of the two supplied catalyst pellets in each one, which I figure downrates it by half, so up to 30 litres. But my tanks are still about a 1/3 of that volume, hence I think I'm at relatively high dosing. That said, the dose is still very low - I guess the 20-30ml in each oxydator lasts 1 to 2 months.
I'm a bit skeptical about the dosing shown in that video. To get that much bubbling would require a fairly high dose of h202 and that is surely not good to the good bacteria in the tank, especially constantly. Also the video is comparing h202 to co2 which seems crazy. Bubbling from h202 treatment might look the same as pearling from co2 injection, but tehy are two completely different things. The bubbles from h202 are not being produced by the plants, only from the h202 oxidising something on their surface.
I really don't buy that the amount of bubbling shown in the video is from the low'ish (1ml per gallon) dose mentioned. Something is not quite right here (based on my own experiments with h202).