Remove OM optin, requires own custom conditional statement (remove optin if x = y).

OptinMonsterInit.js

jQuery(document).ready( function($){
    $(document).on('OptinMonsterInit', function( event, data, object ){
      // If video is playing (add your own logic here), remove the optin.
      if ( data.optin ) {
        $('#om-' + data.optin).remove();
      }
    });
});