It is a big factor, because a bunch of people that rarely touch saws see this guy going on and on about a cutting sequence in multiple videos that is only applicable in <1% of trees and all of a sudden because they have this proverbial hammer, every tree looks like a nail to them. This is why I bring it up to smart people that ask about it before attempting it. Most of the time it makes them understand that just because they saw it on YouTube doesn't mean it's a good choice. For ever smart one that asks here, there are 100 that don't ask...
If he (the YouTuber in question) had a series explaining, in detail, all the different felling cut sequences and explaining better when and why they should be used, I would be fine with him including it in that series. However, he's really just a lifestyle Youtube channel. He attracts mostly non-fallers that fantasize about being fallers. He doesn't really make how to videos, but then he tries to, in the middle of them, teach how to do something that random guys with saws don't understand they probably shouldn't be doing.
He keeps hitting on it because he knows that videos about him explaining that cut sequence get views. He wants views because views = money. So he keeps on with the BCF stuff. If you google search back cut first, 4 videos pop up first result with 'back cut first' in the title and guess who all of them are from? He does this because videos with that in the title make him more money.
I'm not saying he shouldn't make videos that make him money. He should. I'm not telling people to not use this cut sequence. It is useful in certain situations. However, it's definitely not as useful as he likes to make it look. Explaining why it's not that useful and making people aware that it's that prevalent on YouTube because of monetary reasons is absolutely valid.