I don't know where you got this from "update to HEVC Video Extensions from Device Manufacturer" ?
I also don't know what you are trying to do to get this error (your attached images) ?
Surely given its original location, the WindowsApps folder, are you not able to go to the Microsoft Store (APP Store) and install it from there ?
I don't use the Windows Store, I have isolated my system from it, so I can't help in that regard.