You will only see Tutorials on functions that you are able to edit.
If there is not a tutorial on the function you are trying to use it is more likely because Customers do not need to edit those functions.
Please note (**): Depending on the NVR you purchased for your install, you may not have the ability to use all the functions in these videos.
1. How to Change NVR Password
2. How to Log In
3. How to Find SN Code for Mobile App
9. How to Change Time & Date