I have cameras but I still have to check them visually.
If you can have one dedicated camera that works in low light where you can target the rise and fall of their chest then that may work but if it's just an overhead camera it's not going to be the same as checking on them.
I have to POKE my baby every time I go check on him.
Makes me feel better for the next ten minutes.
They get used to me coming in and out. I never have any problem with it. They learn that waking up doesn't net them getting up so they will sleep thru a LOT of noise.