To resolve, enter the following command:

For 3gp:

%windir%\system32\inetsrv\appcmd set config /section:staticContent /+”[fileExtension='.3gp',mimeType='video/3gpp']“

For mp4

%windir%\system32\inetsrv\appcmd set config /section:staticContent /+”[fileExtension='.mp4',mimeType='video/mpeg']“


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