MP4 plays audio only when published

Jun 21, 2016

I have created a course where an mp4 video plays automatically on the 4th slide.  In preview mode everything works corretcly.  Once published the mp4 plays audio only and no video.  I have tested on both the LMS and from the storyline output folder.

I have ruled out server settings because another eLearning with an mp4 works correctly.

The only difference I've noticed between the mp4 t that works and the one that doesn't is that when imported into the project, the working mp4 has a "preview" with a still from the first second of the mp4.

Any help you can offer is appreciated.

Thank you.

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