I don't see how anyone can have a full time job and make quality YouTube videos. As soon as I get home from work and finish any household chores and dinner, I'm pretty beat. It's all I can do to write the game reviews I do. They must have either not very stressful jobs or an idyllic home life. Or they don't play the games they're talking about very much before filming.
I beat the last boss in Guacamelee, so if I can do it, I know you can!