*Update 9/25/18* A new YouTube update that is currently being rolled out changes the function of the code used in the below steps, and removes the option to auto-generate it within the YouTube interface. Please view our blog post A YouTube Update Coming This Week Will Affect Your Embedded Videos! to learn more and see our alternatives to avoiding these "related video" thumbnails.
YouTube is the world's second largest search engine, and an important platform for online video marketing and advertising. It's pretty easy to embed YouTube videos into your company website, but if you're not careful, you can run into problems. Have you ever seen the little thumbnail images that often pop up at the end of a video playing on someone's website? Perhaps even on your website?
Those images represent other videos that share some of the same keywords, and if you click on one of those images, that video will play, and so forth. But unless those other thumbnails lead to more of YOUR videos, your website visitors might see something you don't want them to see! In fact, if you don't disable that feature, it is likely that one of your competitor's videos will pop up when your video ends!