While the algorithm uses other signals, your watch history is the primary way YouTube decides what videos to suggest. If you have decided to explore new interests and the videos coming up in your feed ...

You can delete your search history as well as your watched history. Now that you've cleared your watch history, when you go to the YouTube home page, it should be clear. There should be no videos ...

Hit "Clear History." Here again you start at ... Google will store by clicking on each ("Location History" or "YouTube Search History," e.g.) and electing to "Pause" the storing of searches.