video stops playing sometimes and other times it doesn't

Hi, 

I had the exact same issue where one mp4 video just stopped in the middle and made the whole thing freeze. It was extremely frustrating as this happened only with one video out of a series of videos published exactly under the same settings. 

I found that the issue keeps repeating only on Chrome and Edge browsers. After trying multiple things and nothing seemed to work I finally found a workaround that seemed to have solve the issue. 

In the published folder under story_content I located the mp4 file that was causing the issue. 

I copied the file name and deleted the file, then copied my original mp4 into the story_content folder and replaced its name to the name storyline generated, played the the course and viola, it played till the end.

Hope it helps anyone who's struggling with the same issue, and Articulate's QA team will find a solution soon.