Focus on Videos extension obscures automatically the background content while you're watching, offers a shortcut key, and many other features.
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Here are some key features of "Focus on Videos":
- Automatically hides background content on video start and unhides background content on end.
- Support user / channels
- Adds buttons below the youtube video in order to use it manually and/or change options.
- Change to any color as background.
- Modify the opacity.
- Unhides by (double)clicking on the non video area.
- HTML5 support
- Toggle key (obscure or clear with ESC key)
- Picture as background, just put the URL of a picture or a base64 encoded picture.