ImprovedTube is a Chrome extension that modifies YouTube to give users more control over all aspects of the site. With ImprovedTube, you can adjust the size of the Youtube Player (permanently) and automate if the video description is expanded by default or related videos and annotations hidden, if playlists auto play, reverse or shuffle, what video quality is used by default and many other options. We created our extension carefully to make sure all existing YouTube features function properly and without issue. We care about the user experience and made our options really easy to change and understand. That isn't all, ImprovedTube cares about your privacy and only modifies your YouTube. ImprovedTube even enables fluent playback and together we save tons of electricity (through h.264)

A few more things you can do with ImprovedTube are: Adjust playback speed, disable up-next autoplay, change video size to fit the whole tab or your specific resolution, auto set the volume of videos, auto-pause, hide comments or anything, to save time, to make Youtube more fun or clean to and use it in a presentation for example, ..., ...and much much more. Instead of reading about all of the options, you should install the extension and see for yourself what ImprovedTube can do for you. Many of our users love ImprovedTube so much they can not use YouTube without it.

What are you waiting for? ImprovedTube is free to download and use. With over 250,000 active users, a nearly perfect star rating you have nothing to lose.
We are ready to stay the best and shine through transparent development on Github


More Youtube extensions / apps:

1. The following got some smart, unique or cool features. They are compatible with ImprovedTube (and respected user privacy at the time of our review):
Text features:
Invideo for Youtube - Enabling you to search inside of Youtube Videos
TurboNote - efficiently take and share time-stamped notes
Subtitles For YouTube - drag and drop .SRT files
Playback features:
YouTube Speed Slider - precise slider below Player
Frame by Frame for Youtube
Music features:
MirrorTube
dance or play-along drums. GitHub.com/ktsn/mirror-tube/tree/master/js
Transpose - Pitch - Loop for videos
Save bandwitdh:
Audio Only Youtube (alternatively set low resolution in ImprovedTube)
Youtube-site Features:
FasTube - Prevents reloading YouTube for every video.
Streamkeys (open-source), Ratings Preview for YouTube, Controls for Youtube, Youtube Subscription(Collection) Manager, Video Deck for YouTube, YouTweak, Better YouTube Watch History, Subscriptions Grid For YouTube, Youtube Watched classic view, Youtube Refined.
Youtube-site visuals: Color Changer for YouTube (we are working on theme customization too), Stylish - Custom themes for any website, (Nyan Cat Progress Bar for YouTube, Herp Derp for YouTube)
Content creator ("youtuber / vlogger") features:
Pro Mode for YouTube Video Editor, Tags for YouTub, vidIQ Vision for YouTube, TubeBuddy for YouTube
More:
AlienTube for YouTube (add Reddit comments, or: SnooTube), Video Downloader

2. With ImprovedTube you usually don't need the following:
Similar features:
Looper for Youtube (except we have no "range-slider" yet),
Magic Actions for YouTube, except for video filters (fun) and country location proxy;
Bandwidth Saver, Hide YouTube Comments, Video Adblocker for Youtube, Adblock for Youtube, Floating for YouTube, Window Expander For YouTube, Youtube Playback Speed Control, Video Speed Controller, h264ify (open-source), Enhancer for YouTube, Iridium for YouTube (open-source), DF Tube (Distraction Free for YouTube); Dark Skin; Dark Youtube Theme; Turn Off the Lights, except if you want to control dark-mode with webcam Automatic 4K/HD for Youtube, AutoHD for YouTube, AutoHD Plus for YouTube, Your Quality for YouTube, Reverse Playlist, Theater Mode for YouTube, Auto Replay for YouTube, Listen on Repeat, Youtube Video Repeater, Popout for YouTube. YouClever / 'You Clever videocombine speed up bloggers'.(asking to change privacy settings!)
We did not througly review similar extensions and of course some can be incompatible to eachother sometimes. However that's no real issue. Test them and tell us if you can identify any issues. (Just know that many popular extensions / apps require permissions to datamine browsing activity history, alterts or ads when they could easily make permissions optional opt-in.)

3. Are you still using any of the following? Why? Let us know and please help us contacting their developers, so that we can team up / help them to update:
Popular but outdated (a common fate):
SmartVideo For Youtube, Dash Playback, YouTube Advanced Control; YouTubeCenter, YouTube Flash Video Player, Flash-HTML5 for YouTube, Disable Youtube HTML5 Player, Flash Player for YouTube. Are you a developer? We will be happy to review & link your Youtube Project above. Join us on Github