Wistia analyzed half a million videos and more than 1.3 billion plays to figure out the best video length…

Wistia analyzed 564,710 videos and more than 1.3 billion plays. Here’s what they found:

1. Videos up to 2 minutes in length get the highest engagement.
2. Engagement is the same between 1 second and 2 minutes.
3. There is significant drop-off between 2 and 7 minutes (every second counts).

Source: https://wistia.com/learn/marketing/optimal-video-length?