That was playing an .mp4 file. When I play an .mov file, totem crashes instead of hangs, providing a hopefully more useful error message:
totem: gen9_mfd.c:649: gen9_hcpd_get_reference_picture_frame_id: Assertion `0' failed. Aborted -- You received this bug notification because you are a member of Ubuntu Desktop Bugs, which is subscribed to totem in Ubuntu. https://bugs.launchpad.net/bugs/1818862 Title: Totem player hangs when seeking video To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/totem/+bug/1818862/+subscriptions -- desktop-bugs mailing list desktop-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/desktop-bugs