What's a disorder and what's not is based purely on current social norms. It is evident that, though there are still homophobic people around today, the general social attitude towards gay people is now a lot more accepting than it was a few decades ago, so now it's not a disorder anymore.
If society somehow decided that stepping on leaves was immoral (silly example, but you get my point), that'd be classed as a disorder too.
As for the old propaganda video, those things are always stupid. My favourite, in terms of hilarity, is
this one (I won't embed it since hyperlexian got maaaaaad last time I did so).