Yes, if you own Android devices, you can use one of the phones to monitor the other one. You can download and install applications like IP Webcam. This tool will allow you monitor the camera from the other phone using Ivideon service. For further information, I recommend you contact the developers using
firstname.lastname@example.org email address. Unfortunately, if you're using another phone model, you will not be able to use it for your purpose, because there is no software available.
Note: Your Android phones don't need to use the same Internet connection. You can access the Ivideon service using the web browser of your mobile.