I just watched a few minutes of "Ryan disappear[s] through a Secret Portal in the house to the North Pole" and am thoroughly impressed. Clearly a lot goes into the concepts, sets, and overall production of these videos. I don't know all of the details, but I can imagine how building a business like this could be one of the cooler ways for a family to spend quality time together.
I'm not sure if you're being serious, but that video was honestly minimal amount of effort when it came to effects, sets and production. There are channels on Youtube with a fraction of the following that produce content orders of magnitude more professional than that. This kind of video can be made by some amateur producer in their bedroom. Considering they make 22M, you'd really think they'd spend money on at least…
...why? Their current production values seem to be doing well.