Installing a camera on the ceiling could be as easy as pie. Check out the links below according to the Reolink cameras you have and try to install one by yourself.

Applies to: RLC-420, RLC-420-5MP, RLC-422, RLC-422W, RLC-520, RLC-520A,RLC-522, RLC-542WA, RLC-820, RLC-820A, RLC-822A, RLC-824A, RLC-833A, RLC-842A, RLC-1224A, D400, D800.

You can refer to this article to install RLC-520, RLC-520A, RLC-522, RLC-820A, RLC-822A, RLC-824A, RLC-833A, RLC-1224A, D400 and D800:

How to Mount RLC-520/RLC-520A/RLC-522/RLC-820A/RLC-822A/RLC-824A/RLC-833A/RLC-1224A/D400/D800

You can refer to this article to install RLC-420 and RLC-420-5MP:

How to Install/Mount the RLC-420

 You can refer to this article to install the RLC-422 series, RLC-542WA, and RLC-842A:

How to Install RLC-842A/RLC-542WA/RLC-422/RLC-422W