: This is the video compression standard used, ensuring high-quality video at a manageable file size.
If you are looking at this specific file, you are likely viewing: download-law-and-order-s22e01-web-h264-tvd-mp4
: This indicates the source of the video was a streaming service (like Peacock or NBC.com) rather than a TV broadcast (HDTV) or a physical disc. : This is the video compression standard used,