I don't understand how a social media account is supposed to work with an anonymous group. Do multiple people have access? Everyone?

Would be amusing if they had a blue checkmark.

One of the previous owner certainly does, namely Dell Cameron, who wanted to turn Anonymous into some sort of news organization[0], hence the name. He's a journalist who wrote for the Daily Dot, mostly about anything relating to Anonymous and WikiLeaks, but oddly enough also affiliated with people like Sabu (the founder of Lulzsec and FBI informant who set up all the hackers from the times of the Stratfor leaks, like Jeremy Hammond, who ended in prison).

I don't know who the current owner is but it's certainly not to be trusted by any hacktivist.

Edit: Another owner of the YourAnonNews account was Dan Stuckey, a Vice journalist, who was the one affiliating with Sabu[1]. Him and Dell operated the account for a long time, maybe they still do.

[0] https://www.gawker.com/anonymous-tries-to-found-a-legit-news... [1] https://thecryptosphere.com/2015/03/15/fuck-anonymous-im-at-...

If one is to do it, better to tell no one and let a poser take responsibility.