Fix tweet text content appearing in telegram

- Fix video quality sorting
 - Fix screenName being empty
 - Fix img accessed before declaration
 - Hopefully tweet text content shows now in telegram
 - Add flask_cors dependency
 - Remove unnecesary react-helmet garbage

templates/default.html

@@ -5,7 +5,7 @@
     <meta content="{{ appname }}" property="og:title" />
     <meta content="{{ message }}" property="og:description" />
     <meta content="{{ repo }}" property="og:url" />
-    <meta content="{{ color }}" data-react-helmet="true" name="theme-color" />
+    <meta content="{{ color }}" name="theme-color" />
     <meta http-equiv = "refresh" content = "0; url = {{ repo }}" />
 {% endblock %}