The new feature will allow Tumblr users to live stream video directly to their followers’ Dashboards, and will also be able to send out push notifications when users go live or reblog a live stream.
However, Tumblr not hosting ti own service. Instead, it is integrating with existing services of YouTube, YouNow, Kanvas and Upclose, with Tumblr acting as the publishing and discovery platform for those streams.
All partner apps already support live video streaming to Tumblr on both iOS and Android, except for YouTube which will have iOS support available in a few more days.
Once you share a live video to Tumblr, a push notification will be sent out to all your Tumblr followers. Followers will be alerted also if you republish a live video.