>>1003581It kind of sucks.
In the ~20 hours it took him to make this, he could have pounded a huge amount of stuff by hand. At the rate it works, its going to take months to be time efficient, and that's assuming it doesn't require any maintenance or have any downtime.
That said, it doesn't really matter. It's a proof of concept primarily, just showing that primitive automation is not only possible but viable.
With more precise construction, a larger and more dished striking surface, and the upgrades he talked about in the description like a shed around it and a stone hammer it could have a pretty significant throughput. The amount of work required to get something worth the effort is probably more than a single person wants to bother with, but a primitive civilization would definitely want to have a few of these things going all the time, and that is the point of the channel more than anything.