[FEATURE] Show the lightbox on mobile devices

Resources/Public/JavaScript/youtubeLightbox.js

@@ -13,8 +13,9 @@ module.exports = function() {
 	 */
 	function init() {
 		$('.sg-youtube-item').each(function (index, item) {
-			let $youtubeItem = $(item);
-			if ($youtubeItem.data('disable-lightbox')) {
+			let $youtubeItem = $(item),
+				viewportWidth = Math.max(document.documentElement.clientWidth || 0, window.innerWidth || 0);
+			if ($youtubeItem.data('disable-lightbox') && viewportWidth >= 680) {
 				$youtubeItem.on('click', replaceThumbnailWithVideo);
 			} else {
 				$youtubeItem.magnificPopup({