You can adjust the settings to only change the title and leave the thumbnail. You can also see the orginal title/thumb by hovering over the blue dot next to the title (that might be a setting to enable it?) I don’t like dearrow’s auto thumb generation (pick a random video frame) becuase the random frame is rarley relevent or descriptive. I have that turned off, if there’s no user submitted frame, I’ll see the original instead.