Technology develops at an exponential rate.
This time next year, he'll have developed multi-core integrated electronics powered by refined fossil fuels.
He claims to have invented that spin blower, which is cool. I've seen how the Africans do this, and it requires basically an entire village to make one iron hoe using 2 goat skin forge blowers.
I'll go ahead and submit that video.
But building bellows is much harder. You would need a good skins and good leather crafting skills. I could not build a bellows with valves using primitive means, but I could probably build this blower.