From Xojo Documentation
| This item was deprecated in version 2019r2.
Please use MoviePlayer.OLEMovieObject as a replacement.
Returns an OLEObject that you can use to access the MoviePlayer directly. Documentation for this object can be found here: https://msdn.microsoft.com/en-us/library/windows/desktop/dd563945(v=vs.85).aspx
Sets the "stretchToFit" property in the OLEObject to True: