I watched that video the day it popped up in my sub feed and while there is a bit of misinformation, there's not nearly enough to warrant a whole PSA. For what it is, which is a mere trivia video and not an instructional one, it's pretty harmless.
Most people who watch DYKG are probably already aware that they make mistakes in their videos, especially since they're only brief overviews. Anyone who's actually interested enough to look into switch hacking trivia after seeing this video in particular will inevitably have any misinformation cleared up as they dig deeper.
That's not to excuse their mistakes. Pointing them out in the comments section would definitely be a good idea. However, writing a whole PSA thread on a forum used by people who, based on what's been stated in this thread, don't even know what DYKG is... that just seems a little overboard.