If anyone is curious about which channels I recommend on YouTube, here's a short list.
Flip Aquatics
Aqua Pros
Ben Ochart
Bentley Pascoe
Father Fish
Fistory! Secret History...
George Farmer
Green Aqua
KG Tropicals
LRB Aquatics
MD Fish Tanks
MJ Aquascaping
Palmer Aquatics
PlantedTank
Prime Time Aquatics
Serpa Design
TheCineScaper
Tropica
Aquarium Co-op
...just to name a few of the actual good ones.
I also can add Biotopia and Below Water to that list.
Many on that list are good (serpadesign is phenomenal), but I can also disagree strongly with one or two based on their methods of communication.
Example, one on your list runs a discord group and in his rules, you are not allowed to offer anyone advice unless you are personally approved and to do so you must set up an aquarium using his methods and only his methods AND the advice you give must only be based off of HIS methods. That closes off a lot of learning opportunities for many on both sides.
And the followers spread a lot of harmful information blindly because of that.
I've seen many, many posts spread on Facebook and discord promoting dangerous practices (example, one person insisting they purposely introduce wild parasites to their fish, very dangerous when there are countries with medication bans, getting these things into the hobby without being able to treat them safely and effectively. I get the idea behind it, but it messes things up for the folks who fish aren't exposed and also increases mutations of these parasites that risk getting back into the wild environment they were taken from, where now theyve developed resistances to medications from the hobbyists who dont know how to treat stuff, and leaves the wildlife exposed to a superbug they hadnt evolved a way to cope with, theoretically.)
It's literally run as a cult and I cringe away from nearly anyone promoting this. It's one thing to have a unique method on things, it's another to dictate who can say what and how.