HTML/HTML5 not playing on SharePoint O365

We have published our Storyline 2 projects to HTML (LMS option) and housed them on SharePoint where they play (like a video) by clicking the link. With the SharePoint upgrade to O365 these files are prompting to save but they will not open or play. I tried publishing to CD and Web with the same HTML results - and it does not play. Does anyone know of a solution to have the published version play on SharePoint O365?

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