Twitch streamers raised $17.4 million for charities in 2015

Plus, more juicy live-streaming stats from the year that was.

Twitch is huge. There's no getting around this fact: Video giant YouTube basically copied Twitch's gameplan last year, the site launched Twitch Creative and Twitch Plays sub-sections, it dominated the streaming eSports market, and debuted a successful convention that attracted more than 20,000 people. Twitch has grown so rapidly since its launch in 2011 that it's already jumped the shark at least once.

Just in case anyone was still confused about the bright purple future of live streaming, today the company shared some internal statistics from 2015, including the fact that it helped streamers raise $17.4 million for more than 55 charities last year.

Twitch boasts an average of 1.7 million streamers every month, with an average of 550,000 concurrent viewers. Plus, Twitch argues, its audience watches videos for longer stretches of time than they do no YouTube: 421.6 minutes per viewer for Twitch versus 291 minutes per viewer for YouTube, based on comScore data. Twitch topped out at more than 2 million concurrent views on August 23rd, thanks to two eSports events, the League of Legends NA LCS Finals and ESL One: Cologne 2015.

Last year's top games on Twitch were League of Legends and Counter-Strike: Global Offensive, while Destiny and FIFA 15 were newcomers to the top 10. Mobile views now make up 35 percent of Twitch's audience.

For perspective, rival (and dominant) online video outlet YouTube boasts more than 1 billion users who watch hundreds of millions of hours on the site every day. But, these services have different markets -- Twitch focuses on live content, while YouTube is all about those jump cuts. Both services are clearly learning from each other as they, and their audiences, evolve.