Well, David, it's still puzzling me why THESE 2 particular Windows Media Audio / Video Files need the WVP2 Codec when no other Windows Media Audio / Video Files have needed it before.
I guess my brother's Laptop did have the WVP2 Codec already installed since it played the 2 Videos just fine. Still though, there MUST be something different about these 2 Files. Maybe the person who put the Videos together used that Photo Story mentioned in the GIF you attached. Maybe that could be the key. They were a bunch of still images of my Class Reunion. So, it's NOT like the Videos were put together by some nefarious person.
Maybe I'll wait to install that WVP2 Codec until after I've run an avast Scan and maybe an MBAM Scan.