See the picture to the right. Finally, you are ready to move on to section 3. You will notice that you may search by author, title, subject, or keyword. Since this is a video search, you probably would not search by author. Title is for those of us who know the exact title of the video we want.
Subject is for searches on a particular subject.
Such as in our case. Since I want to search for videos about volcanoes, I will choose this option. You should see a picture similar to the one to the left. It lets the user know that Wayland has one video on volcanoes. In your particular case, there may be more or less.