Keynote - Video stops

Hi,

I work for an AV company and we do conference and event running AV equipment. At one of our events, we embedded a video into keynote with a blank slide either side. During the rehearsals we ran the video 3/4 times with zero issues. Between the afternoon and evening it seems the keynote file has become corrupt and the video stops half way through. The original video file plays fine in quicktime and have also copied both files across to a different Mac with the issue still occurring. I would like to send the file to Apple for them to investigate further.