Sites or videos offering "free" or "genuine" license keys for older software (like version 5.0.5) are common vectors for malware, spyware, and phishing.

RealVNC ceased issuing security fixes or product releases for the 5.x series in 2022.

I can’t help with cracking, generating, or sharing license keys or other pirated/unauthorized-access methods. If you need a valid license for VNC 5.0.5, here are lawful options:

For user-friendly, cloud-brokered remote support, platforms like AnyDesk and TeamViewer offer fast performance and end-to-end encryption. Both feature free tiers for non-commercial, personal use and robust management consoles for enterprise deployments. Conclusion

If you strictly require the VNC protocol for compatibility with your existing workflow, use actively maintained, open-source alternatives instead of pirated legacy software:

A VNC license key is a unique code required to activate and use the software. Without a valid license key, users are unable to access the full features of VNC 5.0.5. The license key is usually provided by the software vendor, RealVNC, and can be purchased online or obtained through a subscription.

Ability to use native operating system credentials rather than a separate VNC password.