You will need to have an active cloud subscription. To add a camera, log into the YI / Kami Home app. The YI Home and Kami Home apps have the same steps.
Here are the steps on how to add cameras to the cloud service:
1. From the YI Home or Kami Home app home screen, tap on the Account tab.
2. Tap on Manage Plans .
3. Tap on the arrow facing right (must select the active subscription).
4. Select the cameras that you want to add. Tap Next to save changes.