If there are people in the VideoLAN community who don't work on VLC, then they are different communities. One might be a superset of the other, but they aren't

If there are people in the VideoLAN community who don't work on VLC, then they are different communities. One might be a superset of the other, but they aren't equivalent. To me, it's not bad wording to mention communities that have a lot of overlap. There's no rule that says you should only list things that are disjoint.