"Highly Compressed" essentially means "Low Bitrate." When you download a 3D movie compressed to 700MB, you are watching a very low bitrate file. While H.265 helps mitigate this, physics eventually wins. You cannot compress a 50GB Blu-ray remux down to 1GB and keep "Extra Quality." The term is often used loosely by uploaders to attract clicks.
Dedicated release groups (like YIFY/YTS in the past, or modern equivalents like Tigole or Joy
