When you think of user-made online video, I bet the site that instantly springs to mind is YouTube. In fact, if I asked you to name another similar site, you might draw a blank. That's how much YouTube dominates the market.
Well, at least that's how much it dominates part of the user-video market. YouTube's live streaming service never really took off the way it hoped.
That's why it's rumored to be in talks to buy Twitch. This live-streaming video site claims 45 million monthly users with 1 million people uploading videos each month.
In March, Twitch hit 1.35 percent of American Internet traffic. That would be a big addition to YouTube's 13.2 percent.
What makes Twitch special is that it focuses on video game videos. People live-stream or upload videos of themselves playing video games and thousands or millions of people watch - including my son, Ian. There's also videos from major gaming sites and even gaming tournaments.
So, how much is YouTube planning to shell out for Twitch? Try $1 billion.
That's not just a lot of money, it's more than half the amount Google originally spent to buy YouTube - $1.65 billion. So, you know YouTube is serious.
This deal isn't final yet, though, and YouTube expects heavy antitrust scrutiny from the government.
Here's a question: If you used Twitch, what video game - past or present - would you like to be playing? Let me know in the comments.