webisode

noun3

1. •
   A short audio or video presentation on an Internet site.
2. •
   An episode of an Internet-based movie, etc.

   • With the pilot webisode Fault Effect done and the additional character concepts prepared, it was time to start laying the groundwork for the initial batch of future webisodes. — 2010
3. •
   An episode of a television show that is only aired online.