Tired of all of the playback issues with the post April 2013 YouTube? The solution is a free buffering application in the Chrome store. It is called SmartVideo for YouTube and you can download it from the Chrome Store
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To use the application, navigate back to YouTube and hover your mouse over the video and you notice a menu will drop down from the video where you can configure some options. For total customization, click on Global Preferences in the lower right corner. Here are the preferences that I used: