Because Kindergarten was hidden for so long, its emergence on the internet sparked intense curiosity. Platforms like (a popular Eastern European social network) are frequently indexed by search engines for hosting obscure, rare, or bootlegged arthouse cinema that is banned from major Western streaming networks.
This phrase is likely a reference to a specific video or photo from 1989 (possibly a Soviet or post-Soviet kindergarten class) that was uploaded to the video hosting site (formerly Odnoklassniki, a popular Russian social network). The word "hot" might be misleading — given the context of "kindergarten," it likely refers to a "trending" or "popular" video, not anything inappropriate. kindergarten 1989 ok ru hot