I have uploaded some videos. Certain videos (some tik tok type porn videos made by Lilykawaiiii and Anaimiya) were not approved I guess? I'm not sure, but I think so because other videos I uploaded more recently were approved instead. How can I know if a video is approved or not? And if so, can I know the reason?

Unfortunately it's pretty unclear at the end of the day exactly which videos or uploads in general were rejected. I think if you uploaded a few videos around the same time and you see some were approved, but you don't see others, then it's very safe to say that the other videos were rejected for whatever reason (in the case of Tiktok videos maybe they weren't porny enough, basically).