I think that the algorithm or whatever the Youtube checking system is recognise nudity or whatever might be offensive or out of order. I had a problem trying to upload an Orthodox christening, video was deleted (or hold, I don,t know) for nudity as long as children are baptised naked. Since then i permanently have a suggestion in Studio legacy for minors. I didn,t worry as long this was a ceremony and the video had nothing to do with child abuse or anything. BUT. I do not know if there is a permanent record over Youtube in Google, combining user data, browsing history etc. Etc. or if the unlisted or private files flagged are forwarded to the authorities or whatever. As they say. Whatever you upload, instantly is out of your control. A person can understand if you explain. A bot? Not.