I can only suppose by that he is meaning a "Farm Engine" or a "Stationary Engine" and the problem is probably one of translation as much as anything else. I also saw several photos where it was referred to as a "Stability Engine".
Clearly the engine in question was built by the company "Slavia" as was the one in the video you listed.
As you know this type of light engine was commonly used around the farm in the early part of the 20th century. Grinding wheat into flour, moving grain to the top of a storage silo, separating corn from the stalks, etc. I have even seen similar but smaller engines running an ice cream churn.

Grinding wheat into flour.

Separating corn stalks from the ears.