It’s called the cocktail party effect. When you’re in a crowded bar with lots of people talking, your brain is able to make sense of the audio coming from the person you want to focus on. If you set up a microphone in a crowded bar you’ll get only crowded bar noise. Modern cell phones have an algorithm to try and do the same thing. It’s two different videos from two different devices which picked up different parts of a crowded noisy hallway.
https://www.dxomark.com/what-is-audio-zoom-for-smartphones/
It’s called the cocktail party effect. When you’re in a crowded bar with lots of people talking, your brain is able to make sense of the audio coming from the person you want to focus on. If you set up a microphone in a crowded bar you’ll get only crowded bar noise. Modern cell phones have an algorithm to try and do the same thing. It’s two different videos from two different devices which picked up different parts of a crowded noisy hallway.