That bit ☝came up early in the video and confirmed something I was already suspecting. I haven't had a non spayed/neutered cat in my life in decades, and in my experience there are few if any sex-based behavioral characteristics between male and female cats that are spayed/neutered as kittens. I wouldn't be surprised if it's different with cats who are altered later in life; I can certainly see how a few years of living with the body chemistry of a mature male or female could make a difference.
I don't know at what age my little girl Willow was spayed because it happened before we met her, but she was 2 years old at most when we adopted her, so she might have been spayed fairly early on. All I know for sure is that she is THE cuddliest, snuggliest cat we've ever had.
Her mega affectionate personality was what attracted us to Willow. Mr. B and I, along with our daughter, had gone to a rescue to check out another cat (also female) that I was interested in. When that cat turned out to be so standoffish that we could hardly get near her, we started checking out the other cats there. And there was this one little tortie who kept running up to us begging for pets and scritches and purring up a storm whenever she got some. We ended up deciding she was the cat for us.
Willow's been with us for about 5 1/2 years now, and she's still a major love bug who doesn't seem to think there's any such thing as "enough" pets and scritches. I don't know if she would have been less cuddly if she'd never been spayed or spayed at a more advanced age, but it's hard to imagine her any other way.