"nicopip" is a free Chrome extension developed by ru_shalm that allows users to watch NicoNico videos and live broadcasts with Picture-in-Picture (PinP) functionality. This unofficial add-on adds a PinP button to the video player's toolbar, enabling users to display videos with comments.

It's important to note that due to the process of overlaying comments onto the video, the playback may be slower compared to regular video playback. However, this feature allows users to enjoy the interactive and engaging experience of watching NicoNico videos with real-time comments.

With "nicopip," users can easily toggle the PinP mode and have the video playing in a small window while browsing other websites or performing other tasks on their Chrome browser. This extension enhances the NicoNico video viewing experience by providing an additional layer of interactivity.

Overall, "nicopip" is a convenient and useful Chrome extension for NicoNico users who want to watch videos with comments in a PinP format. It's a great tool for those who enjoy the engaging community aspect of NicoNico videos.