When you share YouTube videos on WhatsApp, your recipient will be able to watch the video right from the conversation thread. The same thing can be done now for Instagram and Facebook videos, at least for iOS users. WhatsApp brings these features to the 2.18.51 update of the app. It also brings more feature to group chats, including the ability to add or revoke administrator privileges of other users in the chat as well as the ability for active admins to edit the description, icon, and subject of an ongoing chat. The update is currently rolling out to users so you may or may not see it immediately. No word yet when these features will be coming to Android.
Source: Android Central