A Google search for all the movie titles shown reveals the thing they have in common. "Movies From Two Ages Of Theremin Music". The text "RE-COMPOSE" in the puzzle also hints at composers/music. The video clue is 2 sets of 6 fireworks in this pattern ...
Blue Blue Blue Red Blue Blue Blue Blue Blue Blue Red Blue
It's not clear what this means exactly. It's possible that this is to be interpreted as 45 (the fourth and fifth fireworks in each set are red). This may be a reference to the 1945 movie The Lost Weekend "One of the first and best-known American movies to extensively feature the instrument on its soundtrack" or to 45 RPM records which marks the era it first became popular in music. The letters missing from the sign are ERETATHEE but an explanation for those letters is unknown.
The answer is Theremin.
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