This means the file was "ripped" or captured from a legal streaming service (like Netflix, Amazon Prime, or Apple TV). WebRips are generally high quality because they originate from a digital source rather than a physical disc or a cinema recording.
This refers to the audio track. A 5.1 setup includes five full-bandwidth channels (front left, front right, center, surround left, and surround right) and one low-frequency effects channel (the subwoofer). This is essential for the immersive, "surround sound" experience that an action movie like Bullet Train requires. The Plot: Chaos on the Rails bullet train 2022 1080p webrip 51 link
Check platforms like Netflix or Hulu (availability varies by region). This means the file was "ripped" or captured