Вот так воспроизводится видео (см. вложение 2.png)

$ midori -p -g -d https://www.youtube.com
Launching command: '/usr/bin/gdb' --batch -ex 'set print thread-events off' -ex run -ex 'set logging on /var/run/user/1001/midori/gdb.bt' -ex 'bt' --return-child-result --args midori -p   https://www.youtube.com
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib64/libthread_db.so.1".
libva info: VA-API version 0.39.4
libva info: va_getDriverName() returns 0
libva info: Trying to open /usr/lib64/va/drivers/gallium_drv_video.so
libva info: va_openDriver() returns -1
libva info: VA-API version 0.39.4
libva info: va_getDriverName() returns 0
libva info: Trying to open /usr/lib64/va/drivers/gallium_drv_video.so
libva info: va_openDriver() returns -1
libva info: VA-API version 0.39.4
libva info: va_getDriverName() returns 0
libva info: Trying to open /usr/lib64/va/drivers/r600_drv_video.so
libva info: Found init function __vaDriverInit_0_39
libva info: va_openDriver() returns 0
libva info: VA-API version 0.39.4
libva info: va_getDriverName() returns 0
libva info: Trying to open /usr/lib64/va/drivers/r600_drv_video.so
libva info: Found init function __vaDriverInit_0_39
libva info: va_openDriver() returns 0
[Inferior 1 (process 10477) exited normally]

а если так то нормально

$ LIBVA_DRIVER_NAME=vdpau midori -p -g https://youtube.com
Launching command: '/usr/bin/gdb' --batch -ex 'set print thread-events off' -ex run -ex 'set logging on /var/run/user/1001/midori/gdb.bt' -ex 'bt' --return-child-result --args midori -p  https://youtube.com
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib64/libthread_db.so.1".
libva info: VA-API version 0.39.4
libva info: va_getDriverName() returns 0
libva info: User requested driver 'vdpau'
libva info: Trying to open /usr/lib64/va/drivers/vdpau_drv_video.so
libva info: Found init function __vaDriverInit_0_39

ERROR: Caught a segmentation fault while loading plugin file:
/usr/lib64/gstreamer-1.0/libgstvaapi.so

Please either:
- remove it and restart.
- run with --gst-disable-segtrap --gst-disable-registry-fork and debug.
libva info: VA-API version 0.39.4
libva info: va_getDriverName() returns 0
libva info: User requested driver 'vdpau'
libva info: Trying to open /usr/lib64/va/drivers/vdpau_drv_video.so
libva info: Found init function __vaDriverInit_0_39

ERROR: Caught a segmentation fault while loading plugin file:
/usr/lib64/gstreamer-1.0/libgstvaapi.so

Please either:
- remove it and restart.
- run with --gst-disable-segtrap --gst-disable-registry-fork and debug.
[Inferior 1 (process 6222) exited normally]
No stack.