/ 888888 : Common for older NetDVR or Q-See branded hardware. Master Reset Passwords
He leaned back, his eyes catching a faded sticker on the side of the DVR’s metal casing. It wasn't a password, but a MAC address h264 dvr login password
If default passwords fail, you can use these recovery methods provided by technical experts at JustAnswer and Reolink : H.264 Default Password - Google Groups / 888888 : Common for older NetDVR or Q-See branded hardware