This fix only for self hosted videos or videos using the WP Medialements.
Copy below code and paste/append it in WPLMS options panel – Footer – Google analytics code
<script> jQuery(document).ready(function($){ jQuery('.unit_content').on('unit_traverse',function(){ $('video').each(function(){ player = new MediaElementPlayer('video'); $('video').on("play", function() { player.enterFullScreen(); }); }); }); }); </script>
Result :
When user clicks on Play, the player would automatically open in full screen mode :