The cheapest way to record video from a camera?

Question

CCTV

You need to monitor the seller in the stall to make it cheap. You don’t need an online broadcast and everything like that just at least save a record on a flash drive.

Answer 1

Why are you making this observation?
Make sure that the seller honestly violates the laws towards you?
From the point of view of the state, the seller's integrity (officially formalized labor relations) should be controlled by observance of cash discipline and material and commodity liability
(waybills, inventory, etc.).
In other cases, an appeal to the authorities for prosecution will not work.
Based on your video evidence, you can only be fined.
When checking your kiosk, the camera was seized? what's better not to see her or see how you've been doing business in the last 24 hours?
Wasting your time watching videos, it only makes sense to know which of the several to drive in the neck.

Answer 2

If you accept bank cards, then video surveillance is required by the bank! Those. you will be required to record and store the video for a period of time.
Any smartphone with an application or any network ip or wifi camera with the ability to insert a memory card (every second one can do this), you don’t even need to connect the camera to the network, just connect to it, set it up and turn it off, and the camera is in a circle, automatically deleting old records (pieces of video) will write everything that happens.
Be aware that cheap cameras are very unreliable. They may hang, the recording may fail, and whether the memory card is trite to break (they are not very reliable) and you will know about it exactly when you desperately need a recording. That is why they use storage on third-party NAS and servers. By the way, many cheap ip cameras can also do this (i.e. write video directly via ftp or even email, and a little more expensive than any network protocol smb/nfs/...).