Fix - App was force-scrolling to the bottom of the conversations list and message list while doing anything on action bar

Mi Video
New - Enabled online content from YouTube
New - You can download videos from Facebook, Twitter, Instagram and other social media

Privacy protection
New - When app from an unknown source is being launched for the first time, you'll be asked about turning notifications, access to the network and virtual ID on/off for that app

This changelog doesn't mention all changes made by or Xiaomi.