Video issue in Articulate 360

I'm building my first module in 360 and have imported a video using screencast.  The video is 3 mins 25 sec long and plays fine when I review it in the Video editor. 

When I preview the video within the module screen or within the published version on our LMS, the audio goes all the way to the end, but the images cut out about 5-7 seconds before the end of the video.  

Does anyone have any ideas on how to solve this?   Any help greatly appreciated!

Many thanks!

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