If you do not have a tripod at all or you are too lazy to carry it with you constantly, then this homemade product is for you.
This is a very simple device to help make photos clearer in low light conditions.
Of course, this is not a panacea for blurry photos and a full-fledged tripod will not replace this device, but still it is better than nothing.
About how to make it from the video, I think everything will become clear.
This design allows you to minimize the movement of the camera in a vertical plane. If you develop this topic, you can make not one, but two ropes to both legs, resulting in a triangle and thereby avoiding not only vertical movement, but also lateral movement, then the camera will still be able to move only forward backward, but this is already not so scary.
Have a nice shot!