Advertising film or video (5)
I believe the answer is:
promo
<span class="explanation-format__ClueExplanation">I believe this is a double definition.<br/ ><br/ >'<span class="explanation-format__original">advertising film</span>' is the first definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >'<span class="explanation-format__original">video</span>' is the second definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ ></span>
(Other definitions for promo that I've seen before include "advertisement" , "Ad" , "Advertising film/video" , "21 [TRAILER]" , "Advertising film or video" .)