According to Facebook, video chat is a core part of communication and so it wouldn't make sense to be removed from Messenger, even if we're talking about a slimmed down version of the app.
With the addition of video chat, Messenger Lite offers many core messaging capabilities, including sending text, photos, links, as well as audio calls to people with either version of the app.
In order to make use of video chats, simply start a conversation or find the person you would like to chat with in your contact list, then make sure to tap the video icon on the upper right corner of the screen.
Even with the introduction of video chat, Messenger Lite still weighs in under 10MB, making it blazing fast to install and equally fast to start up. Of course, the new video chat option is only available in Messenger Lite for Android.
source: Facebook
