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After 10+ years of training in martial arts I can definitely say this video is crap. An aggressive guy on adrenaline with a knife would have taken him out.
The only effective strategy I’ve ever seen (and this one is not a great option) is to acknowledge you’re probably gonna get cut, and you control where you get cut. Its better to get a superficial wound than a fatal one. My instructor brought in a guy who does training on this specific drill. Extremely difficult stuff but it can be useful if you’re really proficient in it (no,I don’t claim to be proficient in it).
Get away as quickly as possible is still the best strategy.
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You got that right. If the guy was more aggressive as in violence of action. The defender wouldn't have seen the knife only felt it as multiple punches until he realizes he has been stabbed and is bleeding out.
Anyone who stands there with the knife held out is more concerned with intimidation/robbery. It doesn't mean he won't cut/stab only less likely.
Those who say draw a gun at that range will likely loose. Open the range and get away unless you can't due to family with you or you are slower. Then you you can try to defend.