change default YouTube video quality to 1080p or highest available below 1080p. can be used for other video qualities by changing preferred Quality in the code below.

Replaces the YouTube 404 page monkey with a better one made by @dinoboirex1.

Disables ads, swithces off autoplay, adds RSS link, deletes "recommended for you" videos, unhides description, displays all comments, changes profile link to videos page; and changes region to US. Supports Firefox-based browser up to version 36. Newer versions should use a UserAgent (UA) spoofer add-on. YouTube loads a lighter version of the YouTube page for older browsers. This script will require the GreaseMonkey add-on to be executed by the Firefox browser.

Gain control/personalize your advertisement experience on YouTube.

Removes Youtube Ads and other unwanted layers from Playing Videos

View embedded youtube videos in fullscreen on every website

When watching any video, script loads a playlist of the current channel and plays through it. *Try pressing F5 if it doesn't work.*

Youtube and google regularly change your region based on your IP. This userscript automatically sets it to your preferred region instead.

Marks where annotations are on the progress bar of the HTML5 YouTube player.

Marks where annotations are on the progress bar of the HTML5 YouTube player

Remove all shorts

Adds a menu where you can select different zoom/stretch configurations. For Chrome.

Audio Device Selector for youtube

Listen to only the audio on YouTube without loading the video.

Automatically increase volume to 100%

Buffers the video without autoplaying and puts it in HD if the option is on. For Firefox, Opera, & Chrome

Buffers the video without autoplaying and puts it in HD if the option is on. For Firefox, Opera, & Chrome

Will auto close the Youtube popup prompting you to continue playing

Make Play Video Auto Highers

Automatically continue watching YouTube videos on your favourite channels where you left off.

Use Turkish (if available), then English or then translate to English automatically.