Fix the Part 3 Video link and remove Part 4 video link since it does not exist.
{% extends "admin/base.html" %}
{% load i18n %}
{% block title %}{{ title }} | {% trans 'SciPy.in Administration' %}{% endblock %}
{% block branding %}
<h1 id="site-name">{% trans 'SciPy.in Administration' %}</h1>
{% endblock %}
{% block nav-global %}{% endblock %}