Re: Powerpoint insert video error
If you're relying on WMP to play the videos -- that could be the problem. The WineHQ site shows Bronze for WMP 10 -- which is the worst rating you can get if something even runs!
If you can find it, there is a WMP Classic version out there that has been known to work (in Windows, that is) when newer versions of WMP do not.
Problem is, those older versions are rated Garbage in WineHQ.
My personal experience is that Linux is a poor platform to use if you depend on MS Office apps, especially the newer versions.
Ubuntu 16.04 Mate, Mint 18 Mate; MS Win 8.1, MS Win10 Pro.
Will not respond to PM requests for support -- use the forums.