This is one of the most important tags for quality assessment.
Since this appears to be a niche independent film rather than a major blockbuster, details can be scarce. Here is the film profile based on the 2023 release data: CUATRO.2023.720p.AQ.WEBRip.x264.ESub-Katmovie18...
This identifies the software library used to encode the video. This is one of the most important tags