You can set passcode for each of your camera through YI Home Camera app. Every time you need to enter the video page, you will be required for the right PIN. You can set it as steps below.
1. Open the app, and enter the video page;
2. Press the setting icon in the upper right corner;
3. Enable “Pin Protection”;
4. Set up 4 digits password.
After this setting, you should enter the 4 digits password when access to the camera.