The FeelWorld LIVE PRO L1 video switcher is a multicamera streaming device that can take up to four HDMI inputs and output via USB. It is fairly small in size hence, it is quite portable and can stream HD videos. You can not only attach cameras to this switcher but also other HDMI devices.
Using the T-bar controls and a built-in button, you can control the switcher manually. Or, you could also connect it to a computer with optional software to access additional controls. There are USB 3.1 Gen 1 and RJ45 LAN outputs that allow you to live stream your video and embedded audio via a computer to the internet for broadcast to third-party sites such as OBS, Facebook, or Skype, and you can also utilize a smartphone for control using an app.