Issue
The following error will be recieved when trying to open a linked video.
Media error: Format(s) not supported or source(s) not found
Error Code
Media error: Format(s) not supported or source(s) not found
Resolution
Find the location of the video you wish to attach and update it in the document library.
Additional Information
if this does not work, Update the Windows Media Feature Pack and also check for any updates on your machine.