It’s clearly social media. It consists of user-generated content and has discussion features.

There’s a big problem with tech people coming up with their own definition of social media that exclusively includes sites they don’t use (TikTok, Facebook) but conveniently excludes sites they do like (YouTube, Discord, Hacker News). This makes them think extreme regulation and government intervention is a good thing because it will only impact the bad social media sites that they don’t want other people accessing. Then when the laws come out and they realize it impacts social media regardless of whether you like it or use it, they suddenly realize how bad of an idea it was to call for that regulation.