Use variable to set title on base template instead of block

youtube/templates/watch.html

@@ -1,7 +1,7 @@
+{% set page_title = title %}
 {% extends "base.html" %}
 {% import "common_elements.html" as common_elements %}
 {% import "comments.html" as comments %}
-{% block page_title %}{{ title }}{% endblock %}
 {% block style %}
             main{
                 display:grid;