The concert is presented in "Real Video" which is a form of "Real Player" streaming playback. This format will save disc space and should help with download times. The video should only download a very small (4K) link to the actual video.
You will need a free "Real Player" in order to see the video files. I have included a free download link at the bottom of the page. Please BE SURE to select the free player download. "Real Networks" also has a premium service but it is NOT required.