When sharing an image database over several computers, the video thumbnails should not need to be generated on every single computer. Therefore the videothumbnail cache should use the relative path instead of the absolute path of a video file for the hash generation. (Which is also consistent with the image thumbnail mechanism). Bonus points for converting existing videothumbs instead of regenerating completely.
Dear Bug Submitter, This bug has been stagnant for a long time. Could you help us out and re-test if the bug is valid in the latest version? I am setting the status to NEEDSINFO pending your response, please change the Status back to REPORTED when you respond. Thank you for helping us make KDE software even better for everyone!
The issue is still valid. I didn't come around to fixing it yet…