By Phil Santoro
Co-Founder, Reel Partners Media

In a post on Vidyard.com, Jon Spenceley does a terrific job answering this age-old question. Jon says that it depends, of course, on what you are going to do with the video. Attention spans online are very short, so generally speaking videos posted on your website should be between 1.5-3 minutes long.

Videos created for posting on social media need to be much shorter, typically under 15 seconds as Instagram has a 15-second limit. And you need to capture your audience’s attention in the first three seconds. Both Facebook and Twitter have found “a strong correlation between watching the first three seconds of a video and watching that video all the way through,” according to an article published in Ad Age this month.