If you’re a YouTube user, you can add a thumbnail to your videos on Android 2020. This is a great way to show off your video in a more visual way. To do this, open the YouTube app on your phone and click on the three lines in the top left corner of the main screen. Then, select " Thumbnails." Once you’ve selected your thumbnail, it will appear in the list of videos. You can drag and drop it onto the video to make it more visible.