It’s me again. I put the inside tire rim or bead on the wheel rim, stuffed the tube into its tire, made sure the tube wasn’t twisted and that it was oriented so the air valve was through the hole in the wheel rim. That left the outer rim or bead of the tire free. Then I tucked as much of the tire rim or bead as I could without lots of effort, inside the wheel rim across from the air valve. Then I got a smallish C-clamp, put the stationary part of the clamp on the tire tread on the side opposite the air valve, and I located the moving threaded part of the clamp on the nearly flat part of the wheel rim and tightened the clamp until it was holding the tire securely so it that part of the tire bead wouldn’t pop out of the wheel rim. Then, using a large flat end screwdriver, I slowly worked the remaining tire bead into the tire rim, and halleluiah!! it was no time at all until the tire was securely mounted on the rim..
Good video! I’m struggling with the same brand of two-wheeled truck after patching two tube leaks, then working the repaired tube back into the tire (which also seems to have a crack in the side of the tread-Chinese quality!) and will keep struggling to get the tire back on the rim.