This Panasonic AW - HS50 is a great compact live video switcher for HD/SD use. Note that it doesn't come with a power supply. So, you'll need to get one separately for it to work.

To use the Panasonic AW - HS50, first, connect it to a suitable power supply (which you need to purchase separately). Then, connect your video sources to the appropriate inputs. You can easily switch between different live video feeds. When using, make sure to keep it in a well - ventilated area to avoid overheating. For maintenance, clean it regularly with a soft, dry cloth. Don't expose it to extreme temperatures or moisture. If you encounter any problems, refer to the user manual or contact customer service.