I have to find all HD videos: 1920x1080 or 1280x720
I don't understand how to create a filter to find these files.
If Opus (and the video codecs/splitters on your system) can display the Width and Height of the videos, then you should be able to set up a filter like this:
But first, check that Opus can get the details about the types of files you're interested in. To do that, add the Movies > Width and Height columns to your lister and see if they populate with the correct values.
If they don't work for your files, try this, which will get similar data via the Windows shell, which works better sometimes:
That post also includes examples of how to search by dimensions when using its columns.
Ok now