Paraphrasing Bruce McKinney on Visual Basic (who was probably paraphrasing someone else): "Django-based CMS systems make the easy easier and the hard impossible".

I worked with Django for about 4 years of my life, maybe more if we consider some proof-of-concept projects. Every single 'framework on top of the framework' (with the exception of Django REST Framework) I've tried has been 'almost perfect', but that little delta between what you have and perfection is impossible to bridge. Just the dependency hell introduced by some of the projects is reason enough to give up.

If all you want is a simple CMS with support for some markup and adding images/videos, you can throw that together using Django, the Markdown module and one of the myriad upload plugins in a couple of days. You want to provide RSS? Use the built-in feed system. You'll spend more time reading the documentation and tweaking the settings file than putting the whole thing together yourself.