IP cameras in my case?

Question

CCTV

Hello friends!
Introductory: There is a room, it has one old netbook, a smartphone that is used as a modem, there is no cable in principle, and as far as I understand it is not planned.
Essence of the question: How to carry out video surveillance of this room with minimal financial losses?
PS Ready to answer all leading questions. Thank you all in advance!

Answer 1

Take a camera that writes to a USB flash drive when moving (with a motion sensor). It is even easier to buy a car DVR - it will write everything in a cycle.

Answer 2

Remove the registrar from the wheelbarrow and tape it in the corner.

Answer 3

Install CerberusApp on your phone, place the phone's camera lens so that you can see the whole room and in the browser from anywhere in the world give the command "Take a photo". This will be mega video surveillance, if you really decide to use the phone as a modem for the video stream.
Now jokes aside. In your case, it is better to buy a DVR for one channel (analogue), for example, 5 thousand without hard. And a camera for 500 rubles. Cheaper nowhere. Or a Chinese camera, with software for a laptop. The laptop is turned on around the clock, then.

Answer 4

Install a webcam, connect to a netbook, install a program, for example, WebcamXP. The only limitation is the length of the USB cable to the camera, with a five-meter camera they often behave inappropriately, they constantly disappear. To organize access to broadcasting images via the Internet, you will most likely have to make a VPN. Since 3G modems (which I have encountered) receive "gray" IP addresses from their subnet, and it is impossible to connect to them from the Internet.
Or, if you need several cameras at a great distance from each other, a switch, IP cameras that support the cloud, for example, Ivideon. Install their video server on the netbook, it will create a VPN itself, and will broadcast the image to their website.