There are tons of music tracks available on YouTube and Headset helps you discover and play those on your machine.
MinTube for Android allows you to play YouTube in floating windows and/or minimize it to only listen to the audio.
Ever wanted to search inside videos? Invideo for Youtube will let you do that for videos on YouTube.
Got something to say about a YouTube video? vdNote will help you take and share notes for your favorite YouTube videos.
YouTube has more to it than what it shows and the Magic Actions for YouTube extension helps you get the most out of it.
Universal Word will translate Youtube subtitle for you in your browser.
mps-youtube allows you to download YouTube content from the Terminal.
ThumbTube helps you to create large thumbnails of your videos so that they appear large when you share them in Facebook or Twitter.
iPhone X introduced a notch on its screen sides and the YouTube Notch Mode brings the same notch experience for YouTube in your Chrome browser.
TubeMate is a free YouTube video downloader app for Android devices.