What you need to do is

Connect a short video cable with BNC connectors at both ends to test whether the camera is normal. If it is normal, it means that the TV cable you bought does not meet the transmission requirements of surveillance video and needs to be replaced by a 75-3 video dedicated line.

If you want to connect to a computer, you need a video capture card. If you need to watch on your mobile phone, you have to choose a video capture card that supports remote viewing on your mobile phone when you buy it. Moreover, the mobile phone network needs more than 3G, otherwise it will be very difficult to watch videos, and the 3G or 4G network seems to be stuck.

After installing the video capture card on the computer, you need to install a driver to display the video on the computer, but one disadvantage of using the capture card is that once the computer is turned off, you will not be able to record the video.

Another suggestion is that you can buy a DVR hard disk recorder, which will save a lot of trouble. It is very convenient to buy an extra 500G hard disk to start directly, and it is much more energy-saving than a computer to start 24 hours.

Whether you choose a video capture card or a hard disk video recorder, you need a domain name to access the domain name. You can apply for free use on websites such as peanut shells, but the free use is unstable and there is no need to pay.

At present, some hard disk video recorders in JD.COM Mall will also give away domain names.

To set the domain name, you can set the IP address port of the computer or hard disk video recorder in the video capture card software or hard disk video recorder. You also need to make a dynamic DNS in the router and so on. There will be more detailed instructions when purchasing products.

Is there anything you don't understand?