Update README.md

Author: Stefan Erickson

README.md

@@ -15,7 +15,6 @@ It is important to note that the video you target will use its' parent element t
     <video class="covervid-video" autoplay loop poster="img/video-fallback.png">
         <source src="videos/clouds.webm" type="video/webm">
         <source src="videos/clouds.mp4" type="video/mp4">
-        <source src="videos/clouds.ogv" type="video/ogg">
     </video>
 </div>
  ```