Rise of Web video, beyond 2-minute clips - NYTimes.com

When motion pictures were invented at the end of the 19th century, most films were shorter than a minute, because of the limitations of technology. A little more than a hundred years later when Web videos were introduced, they were also cut short, but for social as well as technical reasons.

Video creators, by and large, thought their audiences were impatient. A three-minute-long comedy skit? Shrink it to 90 seconds. Slow Internet connections made for tedious viewing, and there were few ads to cover high delivery costs. And so it became the first commandment of online video: Keep it short...