Got any specific examples? Don't think I've run into anything like that.
There is now a lot of media self created media for gay teens and young adults. Media in that YouTube realm occasionally leaks or crosses lines for folks. Depends upon the channel and upon the particular video. Some channels clickbait with decidedly adult thumbnails and descriptions. For example "Davey Wavey" their channel is mostly NSFW. Issue is some folks don't mark their videos as adult and thus are in younger audience streams. It's really on a channel by channel basis. I haven't dived into that space recently. Though I can see that market effect coming in play incentivizing folks to be more provocative in their thumbnails in return for more views. Nothing necessarily new or unique to the gay community. Main issue is creating lines between adult content and non-adult content and recognizing that channels are inclined to purposefully gray that divide. Channels want to be in larger more public non-adult area, but want to include adult/"clickbait" aspects in there videos to improve view counts.
On the propaganda bit I don't think this effect comes really into play with political/activist videos other than them not accruing as much attention.
On another end. There has been criticism within the gay community and it's objectification of relationships.
https://broadly.vice.com/en_us/article/zmbb45/how-gay-couple...
This would fall closer to the off/oversharing "Family Vloggers" who shoot daily videos of their families in hopes of turning a profit. Relationships like individuals are spun into brands and are monetized.
It got so bad YouTube had to mass demonetise all LGBT videos.
Look at this I just found. Unfortunately I can't find the tweets I am talking about. But this is similar. https://aceloewgold.com/2017/07/25/popular-youtube-channels-...
You would also believe the BBC which is linked from the article. http://www.bbc.com/news/blogs-trending-39381889
4chan-like communities are the source of things like pizzagate, raiding other networks to inject disallowed content, or doing things like posting videos of flashing colours on forums for people with epilepsy. Just getting someone reporting on it fuels creation of more videos like this.
It's not that the videos don't exist - it is a problem that kids can run into them by accident via genuine search terms. It's the coded message part, mentioning pizzagate and podesta, mkultra, etc. that's the bullshit part in the aceloewgold article. The simple explanation is that: some weirdos like to create this content and some idiots crave the controversy of making others watch it by accident.
If anyone is forced to watch it, that would be terrible but because of the forced part rather than the content. Otherwise, I'm happy this exists if it makes anyone more comfortable with what they feel.
Ultimately, the basics of LGBT people's lives and identities are not actually hard to discuss with children and are a fact of life, particularly for kids who are LGBT themselves.