Firstly I would rather have it nice and easier to make it something like that, firstly http://www.design3.com/by-software select it by software so Source Engine and UDK. And after that by the area http://www.design3.com/by-software/source-engine which would make it much easier.
Im not worried about the video, but it would be nicer to have them in video form. It could be uploaded through youtube embedded. And old text tutorial been left for people to read as in option.