There is no secret working version of PCSX4. If there were, the emulation community (GBAtemp, /r/emulation, EmuGen) would explode with news. The silence is the loudest proof.
The "PCSX4 GitHub Repack" generally refers to files shared on GitHub (or other file-sharing sites) claiming to be a "repacked" or "pre-installed" version of the supposed "PCSX4" emulator. pcsx4 github repack
The group runs YouTube channels showcasing fluid 60 FPS gameplay of games like Bloodborne or God of War running inside a fake overlay window. These videos are entirely pre-recorded gameplay captures running on actual PS4 hardware. Security Risks of "Repacks" and Downloads There is no secret working version of PCSX4
for other PlayStation consoles (PS1-PS3) the emulation community (GBAtemp