The video signal is an extremely versatile video system.
Various external devices are also on sale.
Various items to convert to USB are also on sale.
Power supply is unnecessary, and it seems that many are small and inexpensive.
The bottom photo is about 4000 yen, but there seems to be some sold at around 2000 yen.
In the case of video signal (NTSC), the total number of scanning lines is 525 lines.
When converting to USB, it becomes about 640 X 480 (about 300 thousand pixels equivalent).
Recent USB cameras are commonly megapixels. Compared to them, the resolution is slightly inferior.
However, the frame rate is fast and the data capacity is small, it is suitable for storing moving images.