This is the better video.
This was the semester long project we did in class for Machine Tool Technology at the University of Central Missouri. I would like to hook the engine up to something and do tests.
The base is made out of a 3/4 in thick aluminum and the body and cylinder is mild steel. The flywheel and crank is made out of brass. I used most tools that you would use with metals. Vertical mill, horizontal mill, metal lathe, drill press and grinding machine, thread tap. I even machined the threads on the wrist pin.
Here are the plans if any one is interested in making them or for some info on how this was made.
1-2MB .ZIP file with 8 .PDF files for parts.