To save space and reduce clutter, the repack often converts the dual .bin+.cue into a single .chd (Compressed Hunks of Data) file or a .pbp (PSP Eboot). This reduces the ~650MB image down to ~380MB without loss of quality.
You do not need a repack for Disc 1. Any standard .bin/.cue of Yakyuken Special Disc 1 will work. yakyuken special ps1 disc 2 iso repack
Do not use generic YouTube links. Look for: To save space and reduce clutter, the repack