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Wiktionary
midroll

a. (context photography film English) In the middle of a roll of film. n. (context advertising English) A spot ad in the middle of an online video. It is often 15 or 30 seconds long.

Usage examples of "midroll".

If Drizzt, at that time in midroll across the table, had realized just how close his form had come to intercepting the twirling war-hammer, he might have had a few choice words for his friend.