How does time and retention balance out?

KWKBOX

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I noticed a lot of large channels are posting 4 minute or less videos constantly throughout the week. Are they doing this to make money easier? Does 100% retention on a 4 minute video pay better than 50% retention on a 20 minute video? I am just curious what is the reasoning behind all this?
 
Posting something for answer :) But I think they do this for promotion because more retention time means more promotion from YouTube, I don't think it has something to do with money. But I'll be here waiting for a captain :D
 
There is a break even point when you look at retention over time. Generally said a long video need less average retention but YouTube constantly adjusts the exact values.
In principle to keep retention high in a short video and you can place more ads in the same watch time theoretically.
 
I do t think rentstion time matters with ads as the ads show before the video plays.
But I guess they make their videos short just so that the audience would be more intrested to watch the next and have more time to watch the next.
This generation attention time is very short and get bored from long videos.
 
ive heard a lot of youtube gurus talking about 5 minutes or 10 minutes being pretty perfect to aim for depending on content, so i guess a lot are trying for the 5 minutes
 
CPM does not change with audience retention. However, overall watch-time will increase the amount youtube promotes your video. Watch-time is not synonymous with retention, though.
 
YouTube recently changed their algorithm to promote shorter videos. Yes, total watch time is still very important as is audience retention, but internally YouTube is looking at ad revenue per viewing session. They'd rather you watched 100% of 10 4 minute videos than 90% of 1 five hour video. It allows them to serve more ads. From everything I've seen the current sweet spot for video length is around 4 minutes. So basically the perfect video for YouTube is a four minute that has an average watch time of 4 minutes.
 
YouTube recently changed their algorithm to promote shorter videos. Yes, total watch time is still very important as is audience retention, but internally YouTube is looking at ad revenue per viewing session. They'd rather you watched 100% of 10 4 minute videos than 90% of 1 five hour video. It allows them to serve more ads. From everything I've seen the current sweet spot for video length is around 4 minutes. So basically the perfect video for YouTube is a four minute that has an average watch time of 4 minutes.

Hi YouTuber1978, I love reading your posts. I am learning a lot and our channel is benefiting :). I want to thank you for that. One question that still puzzles me is Audience retention. Youtube gives you retention in minutes and in %. Which one matters more? How should I treat what these tell me? I find this utterly confusing. If making good content was all that mattered, then theoretically, the higher my audience retention in per cent is, then the more views that video should get (all my videos are in the same key word group). But I have videos with only above average to average audience retention in per cent that sky rocket into big hits, and then I also have videos with high % retention all the way through but these videos only a few tens of thousands of views. So I began thinking that perhaps audience retention in minutes is what matters the most, but that logic drives me down a road of making loooong vids for no reason and that doesn't seem logical either?

I was hoping to learn your thoughts on this subject and thank you again for all your informative posts.
 
YouTube recently changed their algorithm to promote shorter videos.
That's very interesting, assuming your source is reliable (and based on my next sentence I have no reason to believe it's not). Something definitely changed at the end of August that affected a handful of people here, primarily gamers. Gamer videos are generally longer so what you said would make sense. To me it always seemed as if they've promoted short videos over longer ones, though. That's just been my experience both on my channels and from what I've seen. Personally, I've always kept my videos from being longer than 5 minutes, reasoning that it would be better for retention, and have had a good measure of success.
but internally YouTube is looking at ad revenue per viewing session
Yes, they always have. I talked to a former Google engineer about a year ago who told me he laughs every time he sees a video of a Youtube programmer talking about the algorithm and always speaking in terms of improving the 'viewer session experience' as if that's really their primary goal, because the primary focus has always been the ad revenue generated during that session (they're both very important, and generally one begets the other, but the bottom line is revenue). He said that in addition to (obviously) not being able to talk in any real detail about the algorithm, that his NDA states that he can never mention anything about revenue being used as a factor when constructing/adjusting the algorithms.

The only thing i don't understand about this change you mentioned is why now? This idea that shorter videos generally lead to higher revenue can't be a new revelation to them, they've had how many years of data to figure that out? Also, why 4 minutes? If videos shorter than 4 minutes lead to just as long viewing sessions, you would think that would gain them even more revenue, no? The only thing I can think of is that with the proliferation of mobile devices over the past couple years things have changed to a point where the extra revenue generated by shorter videos matters now much more than it did then.
 
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