finlabsindia/wp-content/plugins/jetpack/modules/theme-tools/responsive-videos/responsive-videos.js

( function( $ ) {

	var resizeTimer;

	function responsiveVideos() {

		$( '.jetpack-video-wrapper' ).find( 'embed, iframe, object' ).each( function() {
			var _this, videoWidth, videoHeight, videoRatio, videoWrapper, videoMargin, containerWidth;

			_this = $( this );
			videoMargin = 0;

			if ( _this.parents( '.jetpack-video-wrapper' ).prev( 'p' ).css( 'text-align' ) === 'center' ) {
				videoMargin = '0 auto';
			}

			if ( ! _this.attr( 'data-ratio' ) ) {
				_this
					.attr( 'data-ratio', this.height / this.width )
					.attr( 'data-width', this.width )
					.attr( 'data-height', this.height )
					.css( {
						'display' : 'block',
						'margin'  : videoMargin
					} );
			}

			videoWidth     = _this.attr( 'data-width' );
			videoHeight    = _this.attr( 'data-height' );
			videoRatio     = _this.attr( 'data-ratio' );
			videoWrapper   = _this.parent();
			containerWidth = videoWrapper.width();

			if ( videoRatio === 'Infinity' ) {
				videoWidth = '100%';
			}

			_this
				.removeAttr( 'height' )
				.removeAttr( 'width' );

			if ( videoWidth > containerWidth ) {
				_this
					.width( containerWidth )
					.height( containerWidth * videoRatio );
			} else {
				_this
					.width( videoWidth )
					.height( videoHeight );
			}

		} );

	}

	$( document ).ready( function() {
		$( window )
			.on( 'load.jetpack', responsiveVideos )
			.on( 'resize.jetpack', function() {
				clearTimeout( resizeTimer );
				resizeTimer = setTimeout( responsiveVideos, 500 );
			} )
			.on( 'post-load.jetpack', responsiveVideos )
			.resize();
	} );

} )( jQuery );