A mix.
Love @taskmaster4450's content. His videos are about 15 to 20 minutes long but I listen to them at 1.5x to 2x speed. Works fine. @louisthomas' videos are usually about half that long but he talks a bit faster so I can rarely listen to them at 2x. :)
You tend to be a bit verbose at times but your ideas are interesting.
@theycallmedan's videos are really inspiring and he crystallizes ideas very well. They can be a bit long but I can speed them up on 3speak if I'm pressed for time.
I don't think the length of the content is key. You have to maintain the interest of your reader or your viewer. The value of a post as perceived by the recipients has little to do with the length of it, although the work it takes to create them is correlated to word count or minutes (when played at normal speed). The amount of work you put into creating a post has no value by itself and the amount of work that goes into a post cannot be measured by its length. A single image can be the culmination of years of effort.
It depends on what a person is looking for at the time and, what kind of person it is. These days, people think that getting told something short and brief means that they know it, but it doesn't mean they actually understand it.
E=MC2 is a very short piece of information and very much to the point, but what background does a person need to actually know what it means?
There is such a thing as excess verbosity and it's got nothing to do with leaving out information that must be spelt out to the intended audience.
Have you ever looked into NLP? it is interesting.
I've heard of it.
It is worth looking into if interested in how language can affect learning and behaviour.