Video streaming site

Hey. I need a website. The idea of the site is that people can go to it, register, turn on the web camera and broadcast like Periscope and Twitch. The question is what resources are needed for this: hosting, software, etc. And how much it costs.
And of course, that users would see a list of all available broadcasts and could choose the categories that interest them. Please do not count on ready-made solutions of sites, only a unique writing is interested, do not hesitate to write the cost - everything is discussed and resolved. Thank you.