Night mode is an automatic setting which takes advantage of the new wide-angle camera that's in the iPhone 11 and 11 Pro models. It's equipped with a larger sensor that is able to let in more light, allowing for brighter photos when the light is low.
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Apple Filming New iPhone Ads Featuring Video Chat
According to the site's source, the new iPhone is referred to internally as Mammoth / N90. At least one scene from the ad is said to be featuring a video chat conversation between a mother and daughter using the iPhone's new front-facing camera. Engadget also cites a few recent tweets from actors who have revealed they have been auditioning for the new Apple ads.
Video conferencing has been a long discussed possibility for Apple's iPhone, though it has not yet been a very popular feature across many other phones. We've put together this poll to ask how appealing a feature it really is for the next iPhone: