LGBT+ people are people. That means they run the full gamut that you see in people who aren't LGBT+. The difference is in sexuality and/or gender. Gay people like men, bi people like both, lesbians like women, trans people have a gender and biological sex that don't line up. Other than that, they value and dislike similar things to everyone else.

They feel similarly about children as anyone else. That's not to say that every one of them feels the exact same way about it, but that a similar portion of them are protective, nurturing, neutral, avoidant, or predatory towards children as is the general public.

They also use humour to ridicule the absurd, which would apply to the idea that LGBT+ people have a collective agenda when it comes to kids (or anything that isn't reducing dangers to and increasing acceptance of people who are like them or otherwise marginalized for their sexuality or gender, though even that doesn't apply universally).

You're getting a negative response to your comments because the conclusion you draw from them doesn't make logical sense. The most that they could show is that the group of individuals shown in the video has intents like that. My first guess, based on your description, is that they are trolling people who believe in the gay agenda. Second guess would be it's actually people who hate gays pretending to be them to say this and get more people to hate them. Third guess would be that some LGBT+ pedophiles were emboldened by their own mistaken ideas of what pride is and thought they could be open about something that should get some eyes on them.