The file was encoded directly from the commercial physical 4K disc, ensuring the highest-quality master file available (unlike highly compressed web streams). HEVC Video Codec

To "put together a proper piece" for the subject chernobyls012160puhdblurayx26510bithdrmem you are looking at

The final three letters, , act as a digital signature. In the media encoding community, different groups compete to release the best balance of file size and visual fidelity. The tag helps enthusiasts identify the exact release group so they know what level of quality control to expect before opening the file. If you want to dive deeper into video formats, tell me: