The term “digital video” is an umbrella that covers a variety of recording formats—some new and some more than a decade old. You may find some of the older equipment in broadcast studios and editing suites, but it's unlikely you'll want (or be able to afford) to use it. Still, you should know what the various formats are; you may end up needing archival footage from one of them.
ARCHIVAL FOOTAGE: Film or video clips stored for use in future productions.
Let's start by taking a look at those digital video formats that are not DV:
Digitized analog video
Computer video files
Legacy digital formats
Digital Betacam (Digibeta)
Some analog video recording ...