It is easy to add the videos to itunes if you add the feed of the list of clips. With the latest version of the itunes you can preview, buy and download the videos to itunes from the itunes store. Use the source pane in the iTunes and click the iTunes stores link. With that you can browse through the list of music videos, short films, TV shows, and movies links. Select the video that you are interested in and then click the buy button. The videos that you have purchased are added to the library and in the appropriate play list.
Free downloads of the previews are also available in the iTunes stores. You can add videos to the current hard disk and you can also organize them in different hard disks. You can also take a back up of the videos to the CDs and the DVDs from iTunes.