Your problem is you're looking at those videos and thinking that's all they know. Those programs are so dumbed down for the general person to understand that it Damn near isn't the original content. It's only the gist of it. For instance, this forum. I can tell you you can do simple things such as add pictures , make posts, and general shyt. You have no idea of how much work it is to write code that does simple shyt. The website uses numerous languages to compile and show you want you see such as html, css, JavaScript, etc. Basically what I'm getting at is the implementation is completely different from what the normal person sees. Those people use math that would take you years upon years to study, if you even ever were able to understand it.
One could question if the earth was actually round or if its really possible to get to the moon. BUT if that person is not willing to go test it themselves, they must leave it up to the experts to let them know. Basically, if u wanna question something, get into the science yourself. Otherwise it's pointless to debate.