Turns out I wasn't using a clean installation, but one modified via apt-get. I cannot see a way to delete the report, but it should be deleted. I'm sorry if I wasted somebody's time.
** Changed in: gallery-app (Ubuntu) Status: New => Invalid -- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to gallery-app in Ubuntu. https://bugs.launchpad.net/bugs/1530708 Title: Trying to play video results in two thumbnails in gallery and failure to connect with playback backend. Status in gallery-app package in Ubuntu: Invalid Bug description: Upon uploading the attached video file to the Videos directory and using the File Manager app to open it and select the gallery app for handling the video, two thumbnails appear in the gallery, and upon trying to actually play any of them, an error pops up saying "Error playing video. Fail to connect with playback backend." Ubuntu 15.04 OTA 8.5 (BQ stable) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gallery-app/+bug/1530708/+subscriptions -- Mailing list: https://launchpad.net/~touch-packages Post to : touch-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp