This is the weekend you've been waiting! A con held in Helsinki, the (official event page) Tubecon offers an interesting glimpse into the world of tubers for 2 days in Hartwall Areena. Just recently Roni Back, who's the most watched tuber in Finland, released a book: "Tubettajan Käsikirja". Insightful read!
For Tubecon backgrounds, see TubeCon (Wikipedia)