Unwanted border appearing on video element [closed]

Answer 1

The way I finally sorted out following ralph.m comments is as follow:

.video-js .vjs-tech {
  /* make the video larger so it can hide*/
  width: 102%;
  height: 102%;
  /* displace video to hide*/
  left: -5px;
  /* allow space for hiding*/
  margin: -10px;
  position: absolute;
  top: 0;
}

.video-js {
  /* make sure overflow is hidden*/
  overflow: hidden; 
}