I really love this feature and I hope that it receives more love and polish in the future. It's unfortunately unusable with foreign language videos as the subtitles don't pop out with the video. Not sure if this is due to the lack of such an API, or if the major video providers (Netflix, YouTube, etc.) simply haven't implemented it.
My other wishlist feature is to have rewind/forward controls natively in the PIP window.
My other wishlist feature is to have rewind/forward controls natively in the PIP window.