The "crack" didn't recover his files; it was a Trojan horse designed to bypass the legitimate, high-quality, and reliable recovery technology built into the official, paid version of DiskInternals Video Recovery .
Tools such as Disk Drill (offering 100MB free recovery) or Aiseesoft. diskinternals-video-recovery-7-8-0-0-crack-serial-key-latest
The keygen likely installed keyloggers, potentially sending his login credentials for bank accounts and social media to a remote server. The "crack" didn't recover his files; it was