Apps similar to YTWatcher include VacuumTube, which is free and open source. Other options are Minitube, mTube, Tubbler and YouView. In total there are eight YouTube Clients like YTWatcher for Mac, Windows, Linux and the web.
VacuumTube is an unofficial wrapper of YouTube Leanback (the console and Smart TV version of YouTube) for the desktop, with a built-in adblocker and minor enhancements.
Minitube is a YouTube desktop application. With it you can watch YouTube videos in a new way: you type a keyword, Minitube gives you an endless video stream. Minitube is not about cloning the original YouTube web interface, it aims to create a new TV-like experience.
Italy
EU
Provides ad-free YouTube playback with built-in search, lightweight operation without Flash, supports consecutive related videos, easy URL access, and favorites for rewatching, offering a distraction-free desktop experience without login or browser requirements.
United States
YouTube Movie Player for Mac OS X. There is no better place to find movies than on the YouTube website, but did you ever want to play YouTube movies outside of your web browser in a sophisticated way right on your screen.
Find movies on YouTube and drag the movie URL's on Tu.
Browse, watch, convert, and download YouTube videos on your Mac faster, because YouView uses the core technologies of Mac OS X to play instead of Flash allowing video to run smoother on systems with lower specs.
Hassle free, Endless and Unlimited music from Youtube videos. Radio from Youtube Videos with baseline as your favorite song.
iTubeDownloader is simple easy to use YouTube Viewer and downloader. Just search for your YouTube Videos and paste the url and click "Download". It's that simple.
Do you enjoy listening to YouTube's podcasts, audiobooks, interviews or anything else that doesn't require to focus on video? If yes, then MenuTube is for you! Put entire full functional YouTube website into your macOs's menu bar.
Austria
