I experienced something different the other day. I was watching despicable me 4 on my PC and at the end of the movie they sang "everybody wants to rule the world" a few hours later I went to YouTube and on the home page is a video titled "the meaning behind the lyrics of everybody wants to rule the world". real freaky. I never searched for the song in any form on YouTube.
but if you watched the movie with your google account logged in, perhaps others who watched the movie also searched the song from the end of the movies
because youtube and google are the same corporation, if you are logged into a google device and then log into youtube with the same master account, id expect them to know.