Found in newer 4K-to-1080p downscaled remuxes, adding height channels for a fully immersive 3D audio environment. How to Check Your File's Bitrate and Specifications
The acronym generally stands for "Updated" or "Update." In data indexing, this tag is applied when a previous file version requires replacement. v for vendetta 1080p mkv bit upd
The phrase "bit upd" likely refers to keeping the file —meaning the user is looking for the most recent version of the encode, or specifically focusing on the bitrate of the video. In the digital world, bitrate is king. It measures how much data is used to encode each second of the film. A higher bitrate generally means fewer compression artifacts, better grain retention, and a sharper image, though it results in larger file sizes. Found in newer 4K-to-1080p downscaled remuxes, adding height