Repeating video (4)
I believe the answer is:
loop
'repeating video' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for loop that I've seen before include "Curve that bends round and crosses itself" , "ring road, say" , "Oval shape" , "Oval or U-shaped coil or bend" , "going round" .)