Hi,
Is this happening in Edge? If so, have you tried clearing MSN cache and cookies? See if it is just a cache problem, preventing the videos to play properly. Close all MSN tabs, then go to Edge Settings > Privacy, search, and services > Cookies > See all cookies and site data. Search MSN, expand and click on the bin icons on each cookie to delete them. Just let me know if you're using a different browser so I can provide the proper steps.