I use instagram for posting about movies, and to promote on occasion.
Twitter (now X), I don't post on nearly as much as I used to. But I use it mostly to scroll for world news, sports news, movie news, watch film trailers, and 'like' and 'reply' to things I'm interested in.
Pinterest I use rarely. When I do use it, I add relevant pictures to one of my boards.
Facebook I don't use as much as I used to either. Although I have a page, and have alternative plans for it in the future. I still 'like' and 'reply' to posts on a somewhat regular basis though.
LinkedIn I use mostly for promotion.
Threads I'm starting to get more active on with film and promo stuff.
YouTube I use to exclusively to watch film clips, trailers, or music videos. I have a channel but since I've moved on from the movie covering business, and into the writing business, I don't update the channel anymore with trailers, and videos and stuff.