You can't look in on a live video stream because the unit goes into hibernation when nobody's around. Video and Audio QualityWhen someone calls at your door, the video doorbell is only as good as the video and audio in the call. For video, we used a video test chart to evaluate clarity in daytime and nighttime conditions, giving scores based on which portions of the chart were easy to read. Every unit we tested produced great results, though the Ring Doorbell Pro had the best video quality overall. To a lesser extent, we also examined effective field of view and whether the video filled the screen. For example, the video doorbells from Ring each have a wide field of view, but the video has a fish eye effect that doesn't fill the whole screen and distorts the image around the edge.