sudo nano /etc/systemd/system/uvcvideo-trace.service

Add the following content to the service file:

[Unit]
Description=Set uvcvideo trace parameter
After=systemd-modules-load.service

[Service]
Type=oneshot
ExecStart=/bin/bash -c 'echo 0xffff > /sys/module/uvcvideo/parameters/trace'

[Install]
WantedBy=multi-user.target

Then do :

sudo systemctl daemon-reload
sudo systemctl enable uvcvideo-trace.service
sudo systemctl start uvcvideo-trace.service

You can now reboot and check the syslog :

cat /var/log/syslog | grep uvc