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Not op, and not sure if these qualify as cinemagraphs, but they kinda fit the “subtle image movement” description

These just look like vibrating images on my phone

Impressed and sad with how toxic HN can be sometimes

Just sharing some art here, and getting downvoted without even a comment about it. And even getting flagged

@dang care to check what’s going on here?

Maybe because it could be construed as "self-promotion" especially because you didn't bother to tell that you are the author of those tweets.