Turn Off the Lights for Youtube

The entire page will be fading to dark, so you can watch the videos as if you were in the cinema. Works for YouTube™ and beyond.
With a single click on the lamp button, the page will fade to dark. And automatically focus on the video. By clicking on it again, the page will return to normal.

Turn Off the Lights is a lightweight and useful add-in designed for a more comfortable watching experience.

A few great features in this browser extension:
+ Turn the lights back on, by clicking on it
+ Support multiple video sites: YouTube, Dailymotion, Vimeo,… and more
+ Customize your YouTube:
Auto HD: Set videos to play in HD automatically. Users can select from highres > 8K > 5K > 4K > 1080p > 720p > 480p > 360p > 240p > 144p > default
Auto Wide: Automatically plays the video on the widest mode
,… and more
+ Easter Eggs:
Shortcut key: T -> Do you like a real movie theater feeling?
+ Option to make the screen dark when the user clicks on the play button
+ Option to turn on/off the fade in and fade out effects
+ Custom colors
+ Option to Flash Detection
+ Option to Show Dimness Level Bar
+ Option Eye Protection for when it’s night. And with a whitelist/blacklist filter
+ Option atmosphere lighting that shows a glow around the video player
+ Option to show the dark layer on the top of the window
+ Options to shortcut keys:
Ctrl + Shift + L to toggle the lights
Alt + F8 to restore the default opacity value
Alt + F9 to save the current opacity value
Alt + F10 to enable/disable the Eye Protection feature
Alt + (arrow up) to increase the opacity
Alt + (arrow down) to decrease the opacity
Alt + * to toggle the lights on all open tabs
+ Option Camera Motion
+ Option Speech Recognition
+ Option for Mouse Wheel Volume Control for each video player
+ Option to add a filter to the current video player (grayscale, sepia, invert, contrast, saturate, hue rotation, and brightness)
+ Option to show the Audio Visualization effect on top of the current video (Blocks, Frequency, and Music Tunnel)
+ Option to fill the video player in your whole current tab
+ Option to loop the current video player
+ Option to place the Night Mode switch to toggle YouTube in black or white theme. And with a whitelist/blacklist filter
Timestamp: Activate the Night Mode within the chosen time
Blackout: Dims the web page and activates the Night Mode
+ Option to stop YouTube and HTML5 videos from automatically playing.
+ Option Video Screen capture for YouTube and all the HTML5 video players
One frame snapshot to customize the screenshot with filters such as Invert, Blur, Saturation, Grayscale, Hue rotate, etc. And finally save the screenshot in PNG, JPEG, BMP, or WEBP image format
+ Option to Zoom in the video player
+ Option to video playback rate
+ and more…