Once you have downloaded the files, you will need a program to extract the content. You can dind these on the web and are usually free. For a Mac, you could use RAR expander, which is free and very good. I am not sure of the Windows equivalent.

If you are interested in Gospel music, this programme is essential. There are extracts on youtube, which will give you a good idea of the content, but this full documentary is around 1.5 gigs and very good quality.