This article describes a recognised Poopism
: a method of video editing that has been used by a number of poopers.
Subliminal images are images that flash on the screen for a short second, either for shock value or for humor. Notable users are MeiAIDS, CommanderGwonam and LinkOnDrugs.
It is thought to have started with Weegee.
Often shown are pictures of furries, porn, or both. Hentai is sometimes shown as well. Tech Text is a form of subliminal imaging.