I solved the problem, I described here.
I was using the IBM 1401 simulator V3.8-1.
All I did was switch to IBM 1401 simulator Open SIMH V4.1-0, and now the results match the video and the IBM 1401 Fortran manual. Here is the new output.
I actually contacted Mike Albaugh, from that video. He’s working on many things, and didn’t have an immediate answer to my problem off the top of his head. He did ask me to clarify some points. He was nice to respond. I’m glad I solved it and don’t have to bother him further. Although he didn’t act as if it was a bother.