.button
{
  background-color: #4CAF50; /* Green */
  border: none;
  color: white;
  padding: 5px 14px;
  text-align: center;
  text-decoration: none;
  display: inline-block;
  font-size: 14px;
  margin: 4px 2px;
  cursor: pointer;
}
.button2 {background-color: #008CBA;} /* Blue */
.button3 {background-color: #f44336;} /* Red */ 
.button4 {background-color: #e7e7e7; color: black;} /* Gray */ 
.button5 {background-color: #555555;} /* Black */

.xemthem
{
    border-radius: 7.5px;
    border: 2px solid #73AD21;
    text-align: center;
    display: inline-block;
    padding-left: 7.5px; 
    padding-right: 7.5px;
}

.click2go
{
    border-radius: 7.5px;
    border: 2px solid #73AD21;
    text-align: center;
    display: inline-block;
    padding-left: 7.5px; 
    padding-right: 7.5px;
}

.dmsbut 
{
  background-color: #4CAF50;
  border: none;
  color: white;
  padding: 4px 11px;
  text-align: center;
  text-decoration: none;
  display: inline-block;
  font-size: 13px;
  margin: 4px 2px;
  cursor: pointer;
}

.videoInsert {
    position: absolute; 
    right: 0; 
    bottom: 0;
    min-width: 100%; 
    min-height: 100%;
    width: auto; 
    height: auto; 
    z-index: -100;
    background-size: cover;
    overflow: hidden;
}

.videoz {
  height: auto;
  width: 50%;
}