travelin_cat - 2:50 pm on Oct 22, 2012 (gmt 0)

From reelseo:

It means if you keep viewers around on YouTube longer, you're videos will start ranking better. And the view count is discounted at this point. It doesn't mean trying to come out with a ten-minutes-or-longer video just for the sake of coming out with something longer, you actually have to keep those audiences for a long time throughout the video.

We have about 70 videos in our channel. Recently our subscribers and the monetization on the videos jumped significantly. I'm thinking that this new ranking system is the reason.

These are training videos, so it makes sense that people will watch most of the video once they read the description.