These files are usually ripped from Web-DL sources (Amazon, Netflix, Apple TV+). While a Web-DL is excellent (near-lossless), pirate re-encodes often degrade the original. "Extra quality" here simply means less degradation than their standard offering.
If "extra quality" is your priority, consider these official platforms which offer 4K HDR and Dolby Atmos support without security risks: : Best for original series and 4K Dolby Vision content. Amazon Prime Video hdmovie2ninja extra quality
Do you need to find high-quality streams? Are you trying to verify if a specific link is safe to use? These files are usually ripped from Web-DL sources
"Ninja" sites and their mirrors are notorious for aggressive pop-ups. Clicking the wrong "Download" button can trigger scripts that install unwanted software or trackers on your device. hdmovie2ninja extra quality