#videoBtn button{
 width: 2.5em;
    height: 2.5em;
    border: none;
    background-size: 2.5em;
    background-repeat: no-repeat;
    background-position:top left;
    background-color:unset;
     margin:0 1em;
}
.playBtn{
    background-image: url(/video/play.png);
}
.pauseBtn{
    background-image: url(/video/pause.png);
}
.replayBtn{
    background-image: url(/video/replay.png);
}
.voice1{
    background-image: url(/video/voice1.png);
}
.voice0{
    background-image: url(/video/voice0.png);
}



#videoBtn2 button{
 width: 2.5em;
    height: 2.5em;
    border: none;
    background-size: 2.5em;
    background-repeat: no-repeat;
    background-position:top left;
    background-color:unset;
    margin:0 1em;
}