This has been happening fairly actively since at least 2020, its not just youtube, search results have many of the same issues, and its not a single device, its

This has been happening fairly actively since at least 2020, its not just youtube, search results have many of the same issues, and its not a single device, its by person(profile). They've linked many of your devices together so you will see the same consistent videos/results unless you compare with other people, at places that are not your home location.