function getQualityOptions() {
	    // Get sizes from <source> elements
	    return html5.getSources.call(this).map(function (source) {
	      return Number(source.getAttribute('size'));
	    }).filter(Boolean);
	  }
function getQualityOptions() {
	    
	    return html5.getSources.call(this).map(function (source) {
	      return Number(source.getAttribute('size'));
	    }).filter(Boolean);
	  }
function getQualityOptions ( ) { // Get sizes from <source> elements return html5 . getSources . call ( this ) . map ( function ( source ) { return Number ( source . getAttribute ( 'size' ) ) ; } ) . filter ( Boolean ) ; }
Get quality levels
Get quality levels