I've never heard of this before, probly others have.
(excerpt)
Elsagate is a neologism referring to the controversy surrounding videos on YouTube and YouTube Kids that are categorized as "child-friendly", but which contain themes that are inappropriate for children.
Most videos under this classification are notable for presenting content such as graphic violence, sexual situations, fetishes, drugs, alcohol, injections, toilet humor and dangerous or upsetting situations and activities.
And this is just the cleaned up Wiki version. Kappy talks about the videos being intended to, in an MK-ultra like manner, make children more receptive to abuse.
