Thank you for your nice comment @oliviackl.

How long took you to learn all these sound?

I've been beatboxing since 2011, so that makes 7 years now. I haven't been fully beatboxing all those 7 years, so let's say 3-4 years of beatbox practice.

...did your mouth tired after these 2 mins beatbox?

Not a stupid question at all. Practice is key. Breath control and repetition of your sounds. You're brain and your muscles in and around your cheek will get used to it. As if it were a language or like learning how to play a certain sport or instrument. So 2 minutes is no big deal anymore, but let's say 20 minutes straight. that is definitely tiring :P