Searching for more videos while viewing a video is not possible in YouTube. YouTube Fast Search will help you out here. When you click on a video it plays on DragDrop player on the right hand side and you can search on the left.drag and drop them to a playlist window at the bottom of the screen. When your first video is done playing, the next video in your playlist will start. drag and drop them to a playlist window at the bottom of the screen. When your first video is done playing, the next video in your playlist will start. Try YouTube Fast Search here.