Add YouTube playlist support in game detail views and create custom template tag

game/templates/game/musikgame_detail.html

@@ -1,4 +1,5 @@
 {% extends "base.html" %}
+{% load youtube %}
 {% block content %}
     <h1>
         <i class="ri-play-circle-fill"></i> {{ musikgame.date }}
@@ -6,7 +7,7 @@
     {% if musikgame.playlist or musikgame.playlist_loading %}
         <p>
             <a target="_blank"
-               href="https://youtube.com/watch?v={{ musikgame.musicgameorder_set.first.music_video.yt_id }}&list={{ musikgame.playlist }}"
+               href="{% yt_playlist musikgame %}"
                role="button"
                {% if musikgame.playlist_loading %}aria-busy="true"{% endif %}><i class="ri-youtube-fill"></i> Playlist</a>
         </p>