It's no Surviving Edged Weapons, but I laughed.

I mean, they aren't wrong.

"That's not a knife..."

Unfortunately this method doesn't work on Trains/Subways.

You only need to get far enough away until the train hits the next station. I’ve spent years training in knife disarms, and there’s no way I’d do anything but run like hell unless I had no other choice.

This. Self defence instructors seem to be pretty universally agreed on step 1 in confronting someone with a knife:
1: Run away

They are also pretty universally agreed on the best way to win a knife fight if running isn't an option, bring a gun.

This might not be the place for a serious discussion, but have you seen "Surviving Edged Weapons"? Minimum reaction distance for a gun wielding (and well trained) Police officer? 21 feet!

I personally prefer the Indiana Jones approach as used against the swordsman in "Raiders of the Lost Ark".

Not sure I've seen the exact video you mean, but I've seen several showing the reaction distance problem. That's why the video demonstrates the number 1 option, run away.

Carry a gun is inferior to run away, it is just a better option than trying to use years of hand to hand and knife fighting training versus someone with a knife.