I've had this too. In my experience "unoriginal" usually isn't about how much editing you did, it's about whether your clip looks like the same clip everyone else posted. If ten clippers cut the exact same 30 seconds that the creator already put out as a Short, zooms and new captions won't change much. What's helped me: pick a moment nobody else used (scrub the middle of the episode, not the first ten minutes), open on your own hook line as on-screen text instead of the source's intro, and cut it tighter so it doesn't run frame for frame like the original. Also check you're not reposting the same clip across several accounts, that gets flagged fast. Which campaign was it on, if you don't mind sharing? Some are a lot stricter than others.