As most comments seem to have indicated. The value is very subjective. What does the viewer want to get out of it? And more importantly what does the demonstrator present?
I think that seeing work done has value, but that it is far greater if and when the presenter explains not just *what* they are doing - but *why*. If they back up the visual work/demo with a lot of really good relevant details and information then that's more of a best case scenario.
I think that seeing work done has value, but that it is far greater if and when the presenter explains not just *what* they are doing - but *why*. If they back up the visual work/demo with a lot of really good relevant details and information then that's more of a best case scenario.