What is the difference between YouTube and peertube?

I know some things about both, but im still confused for some reason. Like what is the difference between peertube and youtube, which is better?

I was thinking of getting into one of theses for video creation but im not sure which would be better as a sort of hobby? also do i need a powerful pc or a good microphone to get started? is it better to record with or without your voice?

Feel free to add on to this, but please be kind.