PiP Tool is a multimedia application designed for iPhone users, enabling them to watch their favorite YouTube videos in a convenient Picture in Picture (PiP) mode. This functionality allows users to continue listening to videos even when their phone screen is locked, providing a seamless viewing experience. The app supports all videos that have external embedding enabled, making it a versatile choice for video consumption.

To use PiP Tool, users simply need to paste the YouTube video URL into the search box or utilize the shortcut in the Safari share sheet. Once the video is in fullscreen mode, the Picture in Picture button can be activated. The app also features a beta download option for offline viewing; however, the offline player has known bugs and should be used cautiously. Overall, PiP Tool enhances video accessibility and flexibility on iPhone devices.