We just need a big enough flash to reduce the perceived noise. A nearby supernova should do it.

>> "… also while fact checking this comment, I stumbled across Canon's KB stating to use as low an ISO as possible, which the video rails against. They should talk to Canon, I guess?"

But more seriously, photography is full of people who've invested a lot of time and money into a thing who like to speak with great and general authority. Most advice is a matter of aesthetic preference. A high ISO with a short shutter means less blur and potentially less noise since noise is cumulative over an exposure. There's a balance that depends on personal tolerance for the aesthetic impact of noise relative to available light.

Of course, real photographers bring several remote triggered manual flashes and don't worry about such nonsense.