I know I don't have a copy of the video, but I might still have a hard copy of the briefing slides buried in a box somewhere. You could try the Air Force Safety Center at Kirtland or the AMC Flight Safety Office at Scott for the video. The C-130 SPD at W-R might be another possibility.
I don't know how long the a/c stayed afloat, but it had to be sunk by gunfire from a USCG cutter. The tanks were not empty, but not far from it, either. The Columbian BG who put it in the water, a former PBY pilot by the way, knew he had to ditch while he still had power. They also jettisoned a cargo bay full of Mirage parts just prior to ditching.