Multiple users have reported that the GNOME Video player app (‘totem’) may crash almost immediately when trying to play video on a system with NVIDIA graphics using the nouveau video driver.
A developer has suggested this is likely related to bugs in nouveau’s multithreading support.
Bugzilla report: #2123274
An update has been released to fix this issue.
After you update your system in your usual way (and possibly reboot), you should no longer be affected by this problem. If the problem persists, please start a new discussion topic and we’ll help figure out what’s still wrong.