Stream Professor Kosta Vujic's Hat Online Free – Watch Full Movie from Home at 123Movies. . Professor Vujić's Hat (Serbian: Sesir profesora Koste Vujica) is a Serbian movie. The story was first presentet as a TV drama in 1972. The story of professor Kosta Vujić who in the mid-19th century taught an extraordinarily talented generation of gymnasium students, some of whom would go on to become prominent members of the Serbian society and eventually historically significant figures. They include Mihailo "Mika Alas" Petrović, Stevan Stojanović Mokranjac, Jovan Cvijić, and Jaša Prodanović.