Soon you’ll be able to play YouTube video’s in WhatsApp. WhatsApp is working on picture-in-picture (PiP) mode for YouTube.
WaBetaInfo discovered this function in the iOS-app. With picture-in-picture mode you can play video’s in a small screen within the chat and you will no longer redirected to YouTube.
You can move and expand the PiP-screen or you can open the video in a new WhatsApp section for full screen mode.
It is not known if this feature is also under development for Android and Windows Phone yet. A release date for this function in iPhone is also not known yet.