He has turned that into a screen cast using an alternative method of organizing the documents using content types: A Beginner’s Guide to Content Types. The screencast is a great way to show the methods used.
I find the use of content types to be very valuable when use multiple document libraries.
For a single document library like I set up for “Using Your Computer” I find the column and view sorting to work just fine without the content type. If I had the documentation spread across other sites or other libraries, then I would use content types. I find the power of content types to be their ability to reunite information spread across the site collection into one place. For a single document library, it seems to be excessive and adds unneeded complexity.