He's totally joking lol. It's fine if you don't find it funny.

Is he sound like he is joking? He sounds like he is serious.

So wouldn't you agree that the video's meant to be a joke?

Saw your comment on https://www.keyhero.com/online-typing-test/36532/

He's not crazy. He's just playing up a character, and it's one of the funniest things on YouTube.

Btw, was the video you mentioned this one? https://youtu.be/PnvPY_d0njs