1. It depends. If I’m learning a new framework, language, or technology, I’ll generally watch a video to get an overview. This will generally tell me the what. When I start working, I might not remember the how but I’ll look that up. Whether it’s fair or not, a lot of companies look down on learning on the job - especially watching a video. I’ll ususlly watch videos at home and just read docs for specifics at work. Most of the time you can cobble together the template of a solution from code you find on line and modify it if you know what you are looking for.

2. The poster said “Their work is good...”. If their work is good, why does it matter the how?