interstitial
adj.describing the spaces between other things. In advertising, it refers to short videos that play between longer videos on the internet.
adj.relating to the spaces or gaps between other structures or objects. In digital media, specifically describes advertisements that appear between video segments on streaming platforms.
“The interstitial ad plays for five seconds before the video starts.”
“Many streaming services use interstitial ads to generate revenue without interrupting the main content flow.”
“In ecological studies, researchers examine interstitial spaces in soil to understand how microorganisms survive in environments where larger organisms cannot move.”
From Latin interstitiālis. By surface analysis, interstitium + -al.
Etymology adapted from Wiktionary, available under CC BY-SA 4.0.