Is a 10 Hour Microcourse Microtraining?

I met with a client today that was offering their employees 10-hour online courses (conventional course, sequential navigation with chapters) under the name of microtraining. My face was enough to make them realize what I was thinking

At the time, I already stated my opinion on the doubts I have about the real time spent on some online courses, but the reflection is now more subtle. Which duration can be considered a microcourse as a microtraining and which can’t?

I believe that microlearning can be understood from two approaches. On one hand, as a unitary object, of very short duration that provides us with knowledge and/or learning. For example, a video of a few minutes explaining a concept or an idea. You can combine this resource with others of the same or different type, for example, a blog post, an infographic, or a Twitter thread to achieve a certain knowledge.