Time and money are not always available to play every game that interests you. And not always do you actually wanna play a whole game that comes out, but are just interested in certain aspects of it, e.g. you watch it for the story. Or you watch a horror let's play, because you couldn't deal with playing the game yourself.
Many possibilities for watching let's plays. Do you watch them? If so:
1.) Where do you watch it? Which gamer?
2.) Why do you watch it?
3.) How often do you watch let's plays?
4.) And what was the last let's play you watched?
If not: Why not?
Let's Players & Streamers