Seek Lock in Unit Media Lock

a. Go to WP Admin – WPLMS – Footer – Google Analytics code.

b. Paste the following code :

<script>
jQuery(document).ready(function($){
    $('.unit_content').find('audio,video').each(function(){
        if(typeof this.player !== "undefined"){


         if(!$('#mark-complete').hasClass('tip')){return;}

             var _player = this.player;

               old = _player.media.setCurrentTime;
                _player.media.setCurrentTime = function(time) {

                   if(time <= this.currentTime){
                        old.apply(this,[time]);
                    }
                };

       }
    });
    $(document).on('media_loaded','#mark-complete',function(){
     
      $('.unit_content').find('audio,video').each(function(){
        if(typeof this.player !== "undefined"){


         if(!$('#mark-complete').hasClass('tip')){return;}

             var _player = this.player;

               old = _player.media.setCurrentTime;
                _player.media.setCurrentTime = function(time) {

                   if(time <= this.currentTime){
                        old.apply(this,[time]);
                    }
                };

       }
      });  
    });
});
</script>

result :