YouTube is one of the most used video services on the Internet. Most people have a pretty good handle on how to use the site and make the most of it. However, there are plenty of hidden YouTube features that not everyone knows about.

Today, we're going to take a look at one of those called TestTube. Basically, this is YouTube's place to test the latest features it will be rolling out to the site in the near future.

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Right now, there are no major changes available on TestTube, but there are a couple of cool things on there. For example, there's a playlist that features some cool 4K videos and tips on how to find others like them.

The more experimental feature comes in the form of the 4K60FPS video playlist. These videos will put your computer's hardware to the test. YouTube warns:

This feature may not work well on every device, but if you've got a powerful rig, try it out!

If you want to keep up with the latest from YouTube, there's also an option to sign up to participate in future YouTube research and "get rewarded for your time."

Did you know about YouTube's TestTube? Can your computer handle the 4K videos at 60FPS? Let us know in the comments!

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