Magic Actions is a free extension for your web browser which adds loads of new features to videos that you watch on Youtube. You can control the lighting and add additional effects. You can easily and quickly adjust the sound volume. You can choose to always watch the most high-resolution version of the video that's available.
There's loads more too, in this add-on which claims to have more than 4 million users.
Check it out, and download it, from https://www.mycinema.pro/#KR for Chrome, Firefox or Opera.
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Comments
Agree with snowbound999 but then again it hasnt been updated for more than a year.....
Would not work with Firefox 57. I use Dark Theme already on YouTube and as soon as I installed this extension it wanted me to install even more extensions.