Puentes had one point where the image was totally dark in the cabin, which would have given time for extra people in the plane to exit and then that time period could be edited out in that month between the crash and when this video came out.
The GMA announcer (or was it Nightline?) at one point used the time clock on the video to say that everybody was out of the plane in less than 2 minutes into the video. Yet the slowest part of the plane sinking - the part where the mostly-empty fuel tanks kept the plane afloat, before the air inside was displaced by water - was over by the time the video has the last people exiting. The plane is front-heavy - being brought down by the water in the fuel tanks - by the time the last ones got out.
CN you hook your computer up to a projector or large screen TV. You might be able to decipher what you are seeing