Downloading a Vimeo video with a password can be a tricky task due to the platform's security measures. As ethical cyber professionals, it's important to respect the privacy and terms of service of any website or content hosting platform. Attempting to download password-protected videos without authorization violates the rights of content creators and can lead to legal consequences.

However, if you are trying to download a Vimeo video for which you have authorized access, you can use legitimate methods provided by the platform itself. Vimeo offers the option for video owners to allow downloads of their content. If the video has this feature enabled, you can simply click on the 'Download' button below the video player to save it to your device.

If the video requires a password to access, you will need to enter the correct password provided by the video owner or authorized personnel. Without the password, you will not be able to download the video, which is an essential security measure to protect sensitive or private content.

Remember, always respect the privacy and intellectual property rights of content creators when accessing or downloading online content. If you encounter a password-protected video on Vimeo that you believe shouldn't be, you can reach out to Vimeo's support team for assistance.