Forgot to add feed templates

templates/feed.atom

+{% macro summary(entry) %}
+	{% if not course.handle %}
+Veranstaltung: <a href="{{ url_for('course_id', id=entry.course_handle) }}">{{entry.course_title}}</a><br>
+		{% if entry.course_organizer %}
+Veranstalter: {{ entry.course_organizer }}<br>
+		{% endif %}
+	{% endif %}
+	{% if entry.speaker %}
+Gehalten von {{ entry.speaker }}<br>
+	{% endif %}
+{{ entry.comment }}
+{% endmacro %}
+{% macro subtitle() %}
+Veranstaltung: <a href="{{ url_for('course_id', id=course.handle) }}">{{course.title}}</a><br>
+	{% if course.organizer %}
+Veranstalter: {{ course.organizer }}<br>
+	{% endif %}
+<p>{{ course.description }}</p>
+{% endmacro %}
+<?xml version="1.0" encoding="utf-8"?>
+<feed xmlns="http://www.w3.org/2005/Atom">
+ 	<id>{{ course.atomid }}</id>
+	<title>{{ course.title }} — Video AG, FSMPI</title>
+	<author>
+		<name>Video AG, FSMPI, RWTH Aachen</name>
+		<email>video@fsmpi.rwth-aachen.de</email>
+	</author>
+	{% if not course.handle %}
+	<link rel="alternate" href="{{ url_for('course', _external=True) }}" />
+	{% else %}
+	<link rel="alternate" href="{{ url_for('course_id', id=course.handle, _external=True) }}" />
+	{% endif %}
+	<link rel="self" href="{{ request.url }}" />
+	<icon>{{ url_for('static', filename='favicon.png', _external=True) }}</icon>
+	<logo>https://videoag.fsmpi.rwth-aachen.de/site/video-logo-150px.png</logo>
+	<updated>{{ course.updated|rfc3339 }}</updated>
+	{% if not course.handle %}
+	<subtitle>Alle neuen Videos der Video AG!</subtitle>
+	{% else %}
+	<subtitle type="html">{{ subtitle()|e }}</subtitle>
+	{% endif %}
+		
+ 	{% for entry in entries %}
+ 	<entry>
+		<title>{% if not course.handle %}{{ entry.course_short }} {% if entry.semester %}({{ entry.semester|semester }}){% endif %}, {% endif %}{{ entry.time|date }}: {{ entry.title }}</title>
+		{% if not course.handle and entry.course_organizer %}
+		<author>
+			<name>{{ entry.course_organizer }}</name>
+		</author>
+		{% endif %}
+		{% if entry.speaker %}
+		<author>
+			<name>{{ entry.speaker }}</name>
+		</author>
+		{% endif %}
+		<link rel="alternate" href="{{ url_for('play', id=entry.id, _external=True) }}"/>
+		<link rel="enclosure" href="{{ url_for('files', filename=entry.path, _external=True)}}" length="{{ entry.file_size }}"/>
+		<id>{{ entry.atomid }}</id>
+		<updated>{{ entry.updated|rfc3339 }}</updated>
+		<summary type="html">{{ summary(entry)|e }}</summary>
+	</entry>
+ 	{% endfor %}
+</feed>

templates/feed_courses.atom

+{% macro summary(course) %}
+  {% if course.organizer %}
+Veranstalter: {{ course.organizer }}<br>
+  {% endif %}
+<p>{{ course.description }}</p>
+{% endmacro %}
+<?xml version="1.0" encoding="utf-8"?>
+<feed xmlns="http://www.w3.org/2005/Atom">
+ 	<id>{{ atomid }}</id>
+	<updated>{{ updated|rfc3339 }}</updated>
+	<title>Neueste Veranstaltungen — Video AG, FSMPI</title>
+	<author>
+		<name>Video AG, FSMPI, RWTH Aachen</name>
+		<email>video@fsmpi.rwth-aachen.de</email>
+	</author>
+	<link rel="alternate" href="{{ url_for('course', _external=True) }}"/>
+	<link rel="self" href="{{ request.url }}"/>
+	<icon>{{ url_for('static', filename='favicon.png', _external=True) }}</icon>
+	<logo>https://videoag.fsmpi.rwth-aachen.de/site/video-logo-150px.png</logo>
+	<subtitle>Alle neuen Veranstaltungen der Video AG!</subtitle>
+		
+ 	{% for course in courses %}
+ 	<entry>
+		<id>{{ course.atomid }}</id>
+		<updated>{{ course.updated|rfc3339 }}</updated>
+		<title>{{ course.title|e }} {% if course.semester %}({{ course.semester|semester|e }}){% endif %}</title>
+		{% if course.organizer %}
+		<author>
+			<name>{{ course.organizer|e }}</name>
+		</author>
+		{% endif %}
+		<link rel="alternate" href="{{ url_for('course_id', id=course.handle, _external=True) }}"/>
+		<link rel="alternate" href="{{ url_for('feed', handle=course.handle, _external=True) }}" type="application/atom+xml" title="Feed"/>
+		<summary type="html">{{ summary(course)|e }}</summary>
+	</entry>
+ 	{% endfor %}
+</feed>