This subscription gives you unlimited access to Shift Worship's full line of stills, videos, mini movies, and countdowns for one year. If you have people working from various locations, they can all access the media at the same time. Try that with a library of discs.
Shortly after completing checkout, you will be emailed a code and instructions for accessing the site. There is no obligation to renew after a year; but you will probably want to. The folks at Shift are constantly adding new content.