CornerTube: PiP Player for YouTube
iOS has been getting a lot better over the past few years. iPad owners have been able to use PiP mode on their tablet for a while now. With CornerTube, you can do more. This app lets you watch YouTube videos in picture-in-picture mode from anywhere.
The app comes with a widget that detects YouTube links in your clipboard, putting it only a tap away. You can also watch YouTube videos from any app once you tap and hold on a YouTube link. The app also works in Split View multitasking. You can download it for under $3.