Ronster said:
I'm sorry I keep posting I am not trying to hog this thread but I have a pretty concrete answer on the missing scene from the snowspeeders in the Hanger found via music cues.
This animation found in Jamie Bennings "Building Empire" @32.29 Is the missing 2.5 seconds that John williams scored the music to before seeing the AT-AT's attack.
No, it isn't. that animatic is the shot where the speeders approach that is in the movie