Could not open "filename.MOV" because the video file could not be opened.

[lasers100]

Can't open new .MOV files in PS but they do run in LrC.  New files are 4K shot with Nikon Z8.  Is there a problem there?  Older .MOV files, also 4K, shot with Nikon D850 still open properly in PS.

Only the message in the subject line shows up, no other error boxes or messages.

PC running Win10Pro and I just updated PS to 25.5.1.

From LrC the Edit In options are all greyed out.  Tried exporting original from LrC to a different drive and open in PS but get the same message.

Thanks, Bill

[lambiloon]

Hi did tried to install the latest version of QuickTime player?

[lasers100]

Rather than Quicktime (no longer supported and vulnerable according to most posts) I bought the HEVC extension from the Microsoft Store.  I'm now able to view videos directly in Windows but still get the same message when I try to open a file in PS.  Files are .MOV but encoded H.265 (8-bit) whereas previous ones would have been H.264.  Do I need to do anything in PS to get it to recognize the extension?  Still not sure that this is the problem or something else needs to be done.  thanks, Bill