This is the 3089th most frequent Russian word.
камерой
"Камерой" (instrumental case of "камера") means "by/with a camera" or "a chamber."
The word 'камерой' here means 'with a camera', referring to the camera feature of the phone in instrumental case.
Я фотографировал камерой на телефоне.
I took a photo with the camera on my phone.
The word 'камерой' here means 'in front of/on the camera', denoting the physical equipment used for recording.
Она играла сцену перед камерой.
She performed a scene in front of the camera.
While this sentence uses 'камера' instead of 'камерой', it discusses the functional aspect of 'camera' as a surveillance device.