The web wants longer, more informative, more interesting content. That’s the trend among web-first web-native video and it will quickly spread across the web, much as other trends among this influential sub-set of Internet users have.
As with previous trends, professional journalism is betting in the other direction. For-profit/commercial journalism sites are increasingly cutting down the length of web content on the false assumption that mobile is the only method of consumption worth focusing on and that the masses have short attention spans.
For more about this trend, take a read on GigaOM: 30 minutes or more: Why web content keeps getting longer