Stop Autoplay for Youtube™ Extended

Stops autoplay on YouTube™. Extended: Starts the video when you focus the tab. Don't like? Use the version without 'Extended'.--- THIS IS THE EXTENDED VERSION: IT PLAYS THE VIDEO WHEN YOU SWITCH TO THE TAB ---
If you don't want this, search for the version without "Extended" or use this link: https://chrome.google.com/webstore/detail/stop-autoplay-for-youtube/figkapeodjhdgnpiamleongcmecfjccb

Version History
---------------
4.1.0: Modernized the code, more bullet-proof stopping. Merry Christmas!
4.0.6.3: Performance work; Also updated options page to give more information and a way to contact me when having issues.
4.0.5: This release stops pausing on playlist pages.
4.0.4: Right click on YT Video -> Loop is supported now.
Version 4.0: A YouTube™ experiment plays the video after being stopped. This updates addresses that. Also, it has a better performance now.

Description
-----------
If you've ever opened a bunch of videos in the background, you'll know how annoying it is when they all start playing automatically.

With this extension, videos only start playing when you actually switch to tab which has the video in it. You'll never have to worry about videos autoplaying in the background. Plus, they will auto buffer, so no annoying load-spinner.


Do you encounter any problems? Feel free to contact me on the GitHub project page: https://github.com/kurtextrem/StopAutoplay/issues.

FAQ
---
Why does it auto play the video after I switch to the tab?
See below:

What means "Extended"?
Stopped a video because you need to do something else? Switch back to the tab, it will start playing again.
If you don't want the extended feature, try out the standard version: https://chrome.google.com/webstore/detail/stop-autoplay-for-youtube/figkapeodjhdgnpiamleongcmecfjccb (Search for "Stop Autoplay for Youtube" (without the "Extended")