iTubeDownloader 6.4.6 | macOS | 30 mb
A minimalist macOS application that enables you to browse the YouTube website, playback videos, or simply download them to your computer

YouTube has become a very popular video sharing platform but it still does not include a download option for when you want to have offline access to specific media files. iTubeDownloader is a small Mac app designed to remedy the situation.
You can use iTubeDownloader to browse the YouTube webpage and quickly preview videos: when you stumble upon content that you want to have available offline, simply press the "Download" button, and the app takes care of the rest.
Compatibility: OS X 10.10 or later 64-bit
Homepage:

http://www.alphasoftware.com