I think you missed her point entirely because you were so eager to crticise someone, anyone.
I agree this guy was really dumb to wonder why the cable was fried, and we were possibly unlucky not to see a longer video posted two days later from his hospital bed after it exploded. Never plug a wet device to the mains, especially with a battery. My dog knows that (he likes AC).
On Edit: I know it's only 5V max but the battery would pop.
It would have been more interesting to simulate an accidental drop into water, or better a toilet, of not more than 10 seconds, or again for 2 minutes as if you couldn't find it. Then put it in Isopropyl Alcohol, go through all the correct procedures, then go back regularly over 5 - 7 days to see if it recovered completely.
The same for the Note 4 and 3 would be nice.
How many here would drop your device into water and then continue to look at it for 22 minutes? I understand his idea behind it, but it was not real world useful.
He should be struck off for plugging it back in though. Geeze!