The action can't be completed because the folder or a file in it is open in another program. Close the folder or file and try again. This is done for good reason.

Fix Choose something else to play, This item is in a format we don't support, Error 0xc004f011 while playing Video on Windows 11/10 PC.

To resolve the 'Word cannot open the existing file (Normal.dotm)' error, reset the Normal.dotm file, use Open and Repair, and disable add-ins.