Many "repack" installers on unverified sites contain scripts that can hijack your browser or install miners on your PC.
If you want the "Repack" experience (small file size, high quality) legally, the Disney+ app allows you to download the movie directly to your mobile device for offline viewing, which is safer and supports the creators.
These are versions of the movie compressed by groups (like FitGirl or DODI) to make the download smaller without losing significant quality.