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Video on demand (VOD) is a media distribution system that allows users to access videos without a video playback device and the limitations of a typical static broadcasting schedule.

There are several types of VOD:

  • Transactional (paying for each piece of VOD);
  • Premium (access VOD content earlier);
  • Push VOD (preloading VODs to the viewer's set-top box);
  • Advertising VOD (uses an advertising-based revenue model);
  • Near VOD (multiple copies of a piece of content are broadcast at short time intervals);
  • Subscription VOD (uses a subscription business model: subscribers are charged a regular fee to access unlimited programs).