The linked video is a good video.
I don't think I am labeled by most women I interact with as a fucck boy. I am also not a simp.
If you do give off a fucck boy vibe, then having sex on the first date is congruent. I don't think there's ever been an era in which I gave off a big time fucck boy vibe. I prefer extended relationships. I've pretty much always gotten sex by the 3rd date, regardless of whether I approach her in real life or start the interaction via technology.
I think it is easier to get first date sex if the first date is the 2nd total interaction. If the first interaction was a 5-15 min chat in a grocery store or somewhere outdoors, I am in a better place when the first date happens as compared to interacting at first behind some sort of electronic screen.
In the last 15 years or so, the rules around first date sex have changed. To some extent, first date sex can help prevent flaking, so long as your sex game is on point. Sex can get a woman to be more invested, which is crucial when she has so many options and the threshold for getting a second date is much higher due to way more options.
Before dating websites and dating apps got really big, sex on the first date was usually a one night stand. That's still common enough now.
There is always a risk that if you don't go for sex on a first date that you don't see her again. It's a tough risk. There was one swipe app arranged first date I went on that was going well. I had kissed, multi-venued, etc. I drove her back to her apartment complex (she had used a ride share app to get to the date). In my car, the kissing was hot and I had my hand up her dress. Although I could have gotten the first date sex, I didn't do it because it was after midnight and I had some amount of alcohol in my system. I knew the sex wasn't going to be as high quality at 1 am when tired and buzzed. I took a risk that she wouldn't come back. She did come back and we did have sex on a later date.