Well, I thought the old-timer had some good advice. His use of toe straps to hold the seated part of the tire onto the rim was clever. Also he seated the bead into the rim as he was putting the tire on so that he could get some extra slack and then convince the tire to go onto the rim completely by hand without the use of a tire lever. That is pretty good. No soap, no tire levers - just patience and technique. Not bad.

Also worthy of note is that the British "Bicycle Repair Man" in the video also mentioned that the Marathon is a difficult IS A DIFFICULT tire to put onto the wheel. He explains why as well - because of the extra thick, wide, and non-flexible bead area on the tire.

The dude made sure to seat the valve stem to the back of the tire which is a detail I have seen others forget to do.

I didn't see him go around again and make sure the bead was seated into the rim flange. but I will assume that he was confident from doing it as he went along.

I dunno. You can Pooo Pooooo it, but I think the old school dude had some worthy technique and he obviously got the tire onto the rim!