If you’re looking for a legitimate review of The 33 (2015 film starring Antonio Banderas), I’d be happy to provide one based on official sources. Alternatively, if “the 33” refers to something else (a web series, regional film, etc.), please clarify.
Pirated versions frequently suffer from low video and sound quality, often being recorded directly from theater screens. Where to Legally Watch "The 33" filmyzilla the 33
Filmyzilla compresses files to as low as 300MB. In areas with slow internet, downloading a small file is easier than streaming a 2GB HD version on a legal platform. "The 33," being a claustrophobic drama, does not require 4K resolution, making the low-quality pirate version "good enough" for casual viewers. Filmyzilla The 33: Understanding the Risks and Reality