Youtube Instant Replay

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This extension lets you quickly seek youtube video playback forwards and backwards by either 3 or 15 seconds.This tiny and efficient extension helps you easily seek forwards and backwards in youtube videos. If you ever watch videos and want to see an instant replay of something, but get frustrated trying to drag that tiny slider just the right amount backwards, this extension is for you! You can either press a couple keys, or click the rewind button to instantly go back!

This extension will add keyboard shortcuts which quickly seek playback forwards or backwards by either 3 or 15 seconds by default, but you can configure this. Additionally, it can also add new buttons to the Youtube player controls which you can click to go backwards or forwards.

Keyboard Controls:
ctrl+left-arrow: backwards 3 seconds
ctrl+right-arrow: forward 3 seconds
shift+ctrl+left-arrow: backwards 15 seconds
shift+ctrl+right-arrow: forward 15 seconds

For example, it's really easy to hold the ctrl key and then press the left arrow twice to QUICKLY go back 6 seconds!

You can configure how far forwards and backwards each key takes you via the extension config page. Also, if you don't like the buttons that get added to the youtube player, you can disable them. To see the config page, click the extension icon on the top-right of your browser, then select "options", just like on any other extension.

Limitations:
-Keyboard controls don't work when you have your cursor in a text field (such as the youtube search field). Move your cursor or use the buttons.
-This extensions doesn't work on 100% of all websites, but should work for most.
-It generally seeks backwards instantly, but not always when seeking forwards. It basically depends on if you've buffered the movie enough.
-The GUI buttons can only be added to the youtube player if there's enough width - small players are a problem here. If you maximize the player, they will show up, or you can always just use the keyboard controls.

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Changelog
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V1.7 2017-May-26 - Fix for buttons not reliably being displayed.

V1.6 2017-Apr-01 - Battery life improvements for users with lots of browser tabs open.

V1.5 2017-Feb-23 - Code cleanup.

V1.4 2017-Feb-18 - Sometimes the GUI buttons wouldn't show up on videos which needed you to click them in order to start playback. Fixed.

V1.3 2017-Jan-21 - Now, the GUI buttons show how far forwards or backwards they will seek. Also, the buttons are no longer added if the Youtube player isn't wide enough to fit them.

V1.2 2017-Jan-08 - Added fast-forward GUI buttons to Youtube player controls. Also, this extension should now control youtube videos on most websites, not just youtube.com. When multiple youtube players are on the same page, hotkeys will target the youtube player you most recently interacted with (interact means to click it or press a key with the player focused).

V1.1 2017-Jan-02 - Added GUI buttons to Youtube player controls. Also added ability to configure how far forwards / backwards you go.

V1.0 - Initial release.