Recording your work for promotional goals works when your audience can do your job. Watching a chef will teach you how to cook. A programmer may enjoy watching you code.

When your target audience doesn't directly have the skills to understand the raw footage, that's when editing comes in. Think of all the documentaries on PBS. They address I know nothing about, but provide me with enough background information that I can follow what is going on. And in the process, I learned something. Which is great.