On the February 25th 2015, Jovan Radivojsa talked about the Unreal Engine.
Presentation covered history of the Unreal Engine development, basic concepts and hierarchy of the objects inside the engine as well as the UI of the editor. Tutorial of how to create a simple project with an engine was demonstrated through a series of short videos.
Files from the presentation (in Serbian) can be found here: [link]
YouTube videos that were shown during the presentation that cover introduction to the Unreal Engine scripting, UI and editor can be found here.