Up there should be five (5) files:
BriefIntroDoc.pdf (background material)
BriefIntroR.3gp (video for mobile phones)
BriefIntroR.R (screencast transcript)
BriefIntroR.ogv (video in Ogg format)
BriefIntroR.webm (video in WebM format)
The WebM video is definitely the highest quality, but
you need a compatible browser/player to watch it. Check below to see if your
web browser supports the videos, and if not, see How to watch the video for instructions to get one.
A transcript of the R code typed during the screencast (with output omitted) is here. You should be able to copy-paste those commands into an R session and duplicate that shown in the video. For a more detailed introduction read the Brief Intro PDF available here, which is an abbreviated version of Chapter 2 in IPSUR.