The tags in the filename tell you exactly how the video was created and what its quality is:
This is the video codec used. XviD is an older format commonly used for standard definition files to keep file sizes small. Murder.Mystery.2019.WEBRip.XviD.AC3-FGT
This refers to the audio format (Dolby Digital), which provides high-quality multi-channel sound. The tags in the filename tell you exactly