After applying these, your "secret link" is effectively: http://your-ip:random-port/secret-folder-name/ + a password.
: Instead of exposing the server directly to the internet via port forwarding, use a VPN to access your local network securely.
is notable because it explicitly offers a "Secret URL" feature. If "my webcamxp server 8080 secretrar link" keeps failing for you, consider migrating to Yawcam or adding a reverse proxy with authentication.
Here is a deep text based on that theme: