Clean HDMI output refers to a camera's ability to send a signal over HDMI to another device without the camera's internal graphics and indicators appearing over the image. This means that you can connect a camera's signal to another HDMI input without seeing the icons you'll see on the camera's display, for example. While not all cameras offer a clean HDMI output, it's becoming more frequently available even on more inexpensive cameras. Having a clean HDMI out is critical for anyone attempting to use that device as a streaming camera or to record to an external recorder, something that is common with filmmakers and cinema cameras. If you're looking for a new camera for your live streams, take a look at our favorite live streaming cameras in our most popular guide.