At least, that's what the video claims....
I got the plans to build one earlier this spring. Plan on doing it this winter. It's the infamous "kitchen sink" engine, because he ran it Christmas Day on Clara's kitchen sink!
The text below the video says it is a replica.
Somebody had a similar replica running at this year's homecoming event at the MTFCA museum.
Brent Mize has a running replica of Henrys first engine and he demonstrated it at this years Homecoming.
Jason, Where did you find the plans?
Look up Leon Ridenour in Tennessee. He sells them. They come with some things that could be hard to find, like the 'piston rings'. Well worth what little he charges.
Warning- you will need access to machine tools like lathes and mills to make certain parts!
The Home Shop Machinist magazine did a nice two part article on building one a few years ago. I liked the plans and information included there. The back issues are still for sale.
Here's a link to the first issue:
Plans can be had I had a set biult one never could get it to run but a few pops no idea were it is today