Nice video! I see now why my jack lifted the front wheel up and let the rear wheel hang down. That's because I used
both legs on the jack, not just one at the rear of the oil pan. I positioned one leg at the front of the oil pan and one at the rear. My Sears jack is dimensionally like your jack, only Red in color.
Looking at the way you did it, it appears one could just mount one removable "eye hook" into the garage floor on both sides of the bike by the front forks and tie the front down to stabilize the bike.
Most of the time I'm alone at home when I work on my stuff. My nearest neighbor is one mile away. I'm retired and I keep my wife working to support my M/C toy habit!
Most do drugs,,,,. I do bikes!
Now that I have reinvented the wheel and built the front wheel vise, I will use the vise to both change the rear tire and to hold the bike straight up while I change the engine oil. Leaning it on the kick stand is a pain in the ass! Let alone having to sit on the bike to lift it straight up so I can drain all of the oil out of the engine.
Some day after my wife gets two jobs, I will buy a professional M/C work stand like they use at the M/C shops!
Don't tell her, otherwise she will retire too and I'll have her around all of the time having me do "Honey dos" instead of playing with my bikes!