This typically refers to the release year or a specific internal project code (likely 2022 ).
TFPDL is a popular "re-encoder" site that focuses on high-quality, low-size (often under 2GB for 1080p) encodes. tfpdl-fl221080bxh.mkv
The file appears to be a media file encoded or distributed by the TFPDL release group , a platform known for providing compressed movies and TV shows. Analysis of the Filename Based on standard release group naming conventions, This typically refers to the release year or