#myVideo {
  position: fixed;
  right: 0;
  bottom: 0;
  min-width: 100%;
  min-height: 100%;
  max-width: 100%;
  max-height: 100%;
  object-fit: fill;
}

 @media only screen and (max-width: 768px) {
            #myVideo {
                position: relative; /* Change to relative for scrollability */
               height: 100%;
                height: auto;
 } 
 }