The YouTube and Facebook AI algorithms delivered votes to Trump.

What Political News Engagement Tells Us About Donald Trump’s Victory, November 14, 2024
"Harris won with voters who pay serious attention to political news, while Trump solidified much of his support from voters who don’t... the least engaged voters — those who say “none at all” or “a little” when we ask them how much attention they pay to politics — are spending their time on social media platforms like YouTube and Facebook, not on cable news or The New York Times... These “low propensity voters” typically only engage every four years, and the limited news they do consume is often filtered through their social circles or personal media bubbles. Our data suggests that what little political content reached them was overwhelmingly pro-Trump or, at the very least, open to his message."
dataforprogress.org - What political news engagement tells US about donald trumps victory