Red Dwarf Documentaries
There is a playlist on youtube of 7 Drawf documentaries
One for each of the first 7 series.
They are all about an hour long
https://www.youtube.com/watch?v=IqgkdWg9O-E&list=PLXCzxq0XWloQZ2W1EbX3bEoJRAh8UnRWP