More time required = more bouncing users.
I even skip a 5 sponsored ad on youtube. I have no patience for this stuff. The first thing I do is scroll to the comments to see the list of thing the video says (for example top 5 things to eat, or whatever), as I have no patience for these videos being longer just so they get ranked higher, because that's the metric youtube is currently using.
I read HN headlines + top comments, because I have no patience to read a 20 page article that is badly written, or is written in such a way to get more pageviews.
You want engagement? Give me high quality content. Short, long, doesn't matter. High quality, dense content.
The internet is full of fluff. It's like everybody is using this xantham gum these days.