Source: DNNCreative
Video Contents:
How to switch DOC TYPES in DNN 4.4
Introduction
Preparations
Viewing the current render mode
How to create a doctype.xml file
How DotNetNuke uses the doctype.xml file
Testing the new skin
Confirming standards compliance mode and quirks mode for the skins installed on the portal
Time Length: 8min 35secs
You can download the video from here (You have to register for free with DNNCreative first).