I'm veering slightly in topic and only sharing personally, but I actually make a conscious effort to slow down when I am sharing something with other people. In my youth I used to race through all kinds of speech assuming the other person was on the same wavelength (and maybe also some anxiety I was wasting people's time). Recording classes that I currently teach has made me super-aware of bad patterns, which also include completing sentences with "but..." - assuming the unstated alternative is obvious, and using pronouns later in paragraphs like "so we are able to tell this is out of scope" when I really should be saying something like "...so we are able to tell that the doSomething() function is out of scope" to be explicitly clear. Definitely a big mindfulness challenge for me not to fall back into my default mannerisms.
For screen-cap/video instructions, I also try to take a little extra time* but towards making it concise/brief.
* If the instructions are worth making, more time will be spent viewing them than producing them.
I try to get the whole video in one take to save editing but I'll do multiple takes to try to get it right/succinct. I consider the first one a draft/rehearsal (though if it works out, great!).
This still doesn't take very long (even when using a small area of the screen to save file size), and viewers should find it easy to pause or back up a few seconds.
This is all for step by step style instructions rather than heavy conceptual teaching, though.
Also, for documentation it sometimes works even better to make a looping, animated GIF of a single step and then inline that with a text description.
