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Re:Ask HN: What is the optimum length of an explainer video? by DanielStraight on Monday March 14, 2011 @02:28PM (#2323744)
As short as possible. If it takes more than 5 seconds to start seeing the product, I'll start skipping around or leave the site. You don't need a title sequence or intro music. Just start. Get to the point. Make the point. Then stop.

Also, assume some viewers will have their sound muted. Assume some others will switch to another tab and only listen to it.

Re:Ask HN: What is the optimum length of an explainer video? by sunsai on Monday March 14, 2011 @06:02PM (#2324708)
That's a very good point. I will take that on board. Thanks