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She deleted Video A because after she uploaded a new video (Video B), and tried to play Video B, Video A was played instead. User notified me that the issue started occuring after she deleted a video from the library. Thank you in advance for any help you can provide.
#TWEETBOT NOT PLAYING VIDEOS HOW TO#
So right now I'm quite stuck on why SharePoint is failing to load the videos now and hope someone may know the possible causes of the problem, or point me to the direction of how to troubleshoot this. Some said it was caused by permission issue, and some simply said SharePoint does not require Silverlight to play videos.

Needless to say I have googled for quite a few hours and had found nothing that would help. I looked at Event log and ULS log on the production server and could not find any related error messages. Now I think Silverlight would have been installed by Windows Update at some point in time. But after I setup a new SP2016 farm in my Hyper-V, I see that by default Silverlight is not installed, and SharePoint can still play video without Silverlight. So initially I thought this would caused by Silverlight being unintentionally uninstalled by someone, as there seemed to be some update to both servers the day before the issue was found. But as Silverlight is no longer supported, the download link from Microsoft's official site no longer works, and I don't want to just download from other sites that I've never heard of. I believe it would've been installed on the production server before as well as both servers would have been configured nearly identical. I checked that Silverlight is installed on the development server, but missing from the production server. On our development farm, the videos still plays OK.

If I log on to the server and try to play the videos there, 'Install Silverlight' is displayed at the top of the video frame. This was tested using both IE11 and Edge, and Silverlight add-on is installed for IE11. If we try to view videos from client desktop, 'Media failed to load' is displayed. Recently the videos in our production sharepoint 2016 server stopped playing.
