unknown_user63535
I've Got It
I mainly focus on the amount of time being viewed per video as this is the one Google focuses on in the rankings. It used to be based on clicks, but that didn't work out, especially with provocative thumbnails.
I think it's more important to see if new viewers are watching your content after watching one of your videos. I think it's called bounce rate. So a ratio that I like to look at is "views from suggested videos" to "views from YouTube search."