With the YouTube Watched Filter, you can choose to automatically exclude the videos you have already seen on the search results page. This is an easy way to avoid wasting time and energy, but the pop-up might appear on top of videos you actually want to see. So make sure to keep your browser in focus!

To manually exclude videos from the results page, the pop-up will appear whenever you press the search button. You can choose whether you want it to always be displayed or not. If you don't want the extension to log videos you click on from the results page, you can tick off enable in the pop-up.