There are watermarks that can exist inside the video data that reexporting won't remove. However, OF wouldn't do that since it would mean they'd render a video for every subscriber.
-The content MUST be from TikTok, do not post slips from other platforms.
-You MUST include profile names / link to the profile, or make every attempt to include it.
-Include timestamps if you post a long video or a full live video.
-Make sure ALL girls posted are 18+
This also means no children in the background.
No more warnings.
Not sure if it's a valid concern though. I don't think onlyfans includes that sort of thing.