This is a bitrate and resolution claim. During the era when this term was popular (pre-1080p mainstream), "Extra Quality" signified:
and 1st Studio (often associated with phrases like "extra quality") are legacy keywords from the early-to-mid 2000s peer-to-peer (P2P) file-sharing era. They primarily refer to digital video compression formats, specific internet distribution hubs, and early multimedia production studios that gained notoriety on networks like eDonkey2000, LimeWire, and early torrent trackers.
