Unfortunately, this bug report only shows the VLC output. To further isolate the problem, some more tests can be done, notably:
1/ Try to use VLC with a different video output method, especially the plain X11 output.
# vlc -V x11
If that works fine, then it's most certainly a bug in the XVideo driver.
2/ Try to playback without the VLC user interface:
# vlc -I dummy MyMovie.mkv
If that works fine, then it means the user interface is triggering the crash. This is unlikely to be caused by Xorg itself, but could be a problem with the desktop environment or the window manager.
Unfortunately, this bug report only shows the VLC output. To further isolate the problem, some more tests can be done, notably:
1/ Try to use VLC with a different video output method, especially the plain X11 output.
# vlc -V x11
If that works fine, then it's most certainly a bug in the XVideo driver.
2/ Try to playback without the VLC user interface:
# vlc -I dummy MyMovie.mkv
If that works fine, then it means the user interface is triggering the crash. This is unlikely to be caused by Xorg itself, but could be a problem with the desktop environment or the window manager.
In any case, you should provide the Xsession log.