I mean, y'all probably know how I feel about the product WWE's putting out and even I think they couldn't be farther away from being at their "lowest point in history"
If I look just at the average point of the overall quality within the WWE product, I'd say they haven't been as good as they are right now in many, many years. Last time they reached that height of quality was probably that one weirdly outstanding Smackdown year of 2016.
And just from the business point of view, there is no case for that claim whatsoever either. Now I don't think you can just say that making bank equals quality (just look at most Saudi shows, especially the early ones, for example), but yea, all the numbers are either at immense heights no one would've expected for them to hit just a couple of years ago, or are rising again to levels that are tolerable to good.
Now I haven't watched that YouTube video... but if the person, who made it, is sincere about the claim, then that person is a fuckin' clueless muppet called Toxicunt.