While "2021" might refer to a specific digital WEB-DL release or a planned sequel window that never materialized, the film itself is the final installment directed by Michael Bay.
What "Web-DL" usually means
While Blu-ray offers lossless TrueHD, the 2021 Web-DL often comes with or even Atmos metadata . For the average viewer using a soundbar or high-end headphones, the dynamic range compression on the Web-DL is actually better than the disc. You won’t have to crank the volume to hear Anthony Hopkins’s exposition only to blow out your speakers when Megatron roars. transformers the last knight 2017 web dl 2021