I'm a new user to the current version of UDK, so the first thing I did after launching it was go to the Video Tutorial link. I discovered the Video Training Modules (with a VTM prefix on their links) do not work in 64-bit Windows 7. I knew these videos were 7 years old, but thought there'd still be good practices to learn in them. So I downloaded the codecs as instructed, but wasn't able to see video. Only the sound portion worked.
Solution: Import the old tutorials into the current version of Camtasia Studio 8. Add them to the timeline, then "Produce & Share" them to create mp4 videos that work nicely. There is some quality reduction because it's being dropped down to 720p from the original 1280X1024 resolution, but the basics are there in all their glory for anyone who wants to resurrect them.
Anyway, I hope that helps anyone who might have run into the same issue.