Why microlearning works for software
People learn software at the moment of need: they hit a task they can't do and want the answer now. A 2-minute video on exactly that task fits the moment; a 45-minute course does not.
Building a microlearning library
Break every process into single-task videos, pair each with its written steps and a short quiz, and organize by the job to be done rather than by feature. One screen recording can generate all three assets.