B-reels

Noun

B-reel (usually uncountable, plural B-reels)

1. (usually) The second piece of film or audio or video tape in a situation (as editing or broadcasting) where multiple inputs are used.
   • The separate reels of a multiple-chain story are given letter designations: A-reel, B-reel, C-reel.[1969, Maury Green, Television News: Anatomy and Process, page 120
2. (usually) Secondary or supplemental footage to be intercut with principle film or video.
   • Now I remembered that Murph had convinced us not to show the first B reel during our viewing of the full takes, saying that we’d seen it before.1991, Jim Weikart, Casualty Loss, page 151

   Synonyms:

   B roll