fix play.js compatibility with librejs v6

libretube-theme/static/js/play.js

@@ -1,19 +1,17 @@
 // @license magnet:?xt=urn:btih:1f739d935676111cfff4b4693e3816e664797050&dn=gpl-3.0.txt GPL-v3-or-Later
-document.addEventListener('DOMContentLoaded', () => {
-    const player = new Plyr(document.getElementById('player-ply'), {
-        captions: { active: true, language: 'es' },
-        controls: [
-            'play-large',
-            'play',
-            'progress',
-            'current-time',
-            'mute',
-            'volume',
-            'captions',
-            'settings',
-            'download',
-            'fullscreen'
-        ]
-    });
+const player = new Plyr('#player-ply', {
+    captions: { active: true, language: 'es' },
+    controls: [
+        'play-large',
+        'play',
+        'progress',
+        'current-time',
+        'mute',
+        'volume',
+        'captions',
+        'settings',
+        'download',
+        'fullscreen'
+    ]
 });
 // @license-end

libretube-theme/templates/article.html

@@ -260,7 +260,7 @@
             integrity="sha512-RdjLtc1pfBKIQzfefdOMKb93f2l0Uheysnwd5iVpBjUmNI9H7NOM/QdWeAt4uI8+DsUGaU2XCA8So/A7UMyLGg=="
             crossorigin="anonymous"></script>
     <script src="{{ SITEURL }}/{{ THEME_STATIC_DIR }}/js/play.js"
-            integrity="sha512-mngbNmf0TBN1MBHfqVmJpHMIihsDCOhDNwZEuYqm6WZChv6cfeyXJsboDAooCJY2bQzXvj/GblPfTTqdNndgBg=="
+            integrity="sha512-OTfMWEmqrlXA9I5xteZxMa4a1DXs+ocTB5E+9S3TF0asQFqsDltZ8q3AxoMPXLJSW5Bk6ysA/16bIwME7w8CnA=="
             crossorigin="anonymous"></script>
     <!-- /Plyr -->
 {% endblock %}