CornerTube is an iPhone app that allows you to watch YouTube videos in Picture-in-Picture (PiP) mode. With this app, you can enjoy your favorite YouTube videos while multitasking or using other apps on your device.

One of the key features of CornerTube is its Today Widget. This widget detects YouTube links in your clipboard, making it easy to access your favorite YouTube video with just a tap from your Notification Center.

Additionally, CornerTube offers an Action Extension that allows you to watch YouTube videos from any app. Simply tap and hold on a YouTube link, then select "Open in CornerTube" from the list. This convenient feature ensures that watching YouTube videos is just a few taps away, no matter what app you're using.

CornerTube also supports Split View multitasking on compatible devices such as iPad Air 2, iPad mini 4, and iPad Pro or better. This means you can watch YouTube videos while simultaneously using another app in Split View mode.

Furthermore, CornerTube includes an in-app search feature, allowing you to easily find and watch your favorite YouTube videos without having to leave the app.

With CornerTube, you can enhance your YouTube viewing experience by enjoying PiP mode, accessing videos from any app, multitasking with Split View, and searching for videos within the app itself.