/etc/apparmor.d/abstractions/video is in apparmor 2.8.95~2430-0ubuntu5.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 | # vim:syntax=apparmor
# video device access
# System devices
/sys/class/video4linux r,
/sys/class/video4linux/** r,
|