As one of the best YouTube video downloaders on the market, Jihosoft 4K Video Downloader supports downloading videos from almost all video streaming sites (such as YouTube, Facebook, Twitter, Instagram, Vimeo, Dailymotion, etc.). What sets it apart from online websites is that it allows you to download entire YouTube channels & playlists and save them in HD, 2K, or even 4K quality. In addition, it has a one-click download mode that can apply your settings or preferences to all downloads, which will greatly save your time and energy.
If you want to download as videos itself, you can use other free tools like Free Youtube Download to download all videos with a single click. Please be careful while installing this tool as it optionally installs a browser toolbar and modifies search preferences. So please make sure you read and uncheck the optional checkboxes while installing to avoid surprises in your browser.