Method 1 shows you how to download the DICOM data for use in Osirix or other DICOM viewers. Method 2 (44 seconds in) shows you how to download a video which can be scrolled in PowerPoint (1 min 55 seconds in). There is no audio for this - follow the mouse cursor!

When playing the video in PowerPoint, start it, wait till you can see the progress bar, then pause and now you can drag the bar at the bottom to scroll.