Never understood theiry rules.. but I believe it has something to with spam, as mentioned, rather than "soft" nudity.
Here is a full length erotic film with over 600k views.. uncensored nudity, soft erotica.
The whole channel is filled with erotic movies:
https://www.youtube.com/channel/UCRQ...OjS2Xo_FRQ0XBA
Strange isn't it?