Although there are many platforms where we can broadcast, the most popular of them and probably the best is Stream Monkey live streaming solutions, and that is where we will base most of the text. There are other options like Azubu or Hitbox, but they are not so complete, it does not have support for consoles and the number of users is much smaller. Something similar to YouTube (which also makes streaming possible) happens: it has infinite competition, but for the vast majority, and in general, it is the safest option.
Consoles: Xbox One, PlayStation 4 and Wii U
In the case of Xbox One and PlayStation 4, fortunately (almost) everything is done. Both platforms have native applications that allow, with a couple of touches, to start emitting what you are playing without further delay. Just take into account two factors: you need (obviously) a Twitch account well configured with your validated email and you will also have to take into account your internet connection.
What is the appropriate climb width? It depends a lot on the type of game and the context. In the case of Twitch it distinguishes between three general types: On the one hand those that have a very fast camera movement (an FPS, a game of races), those that have a movement of average camera (here it is mainly strategy: League Of Legends, DOTA 2, Starcraft, Age of Empires) and slow or non-existent camera movement (Civilization, Hearthstone). And according to that, adjust the resolution: