I work for Amazon as a Software Developer. I'm an SDE II. There is nothing wrong with copy-pasting off previous coders or looking up solutions online in my opinion. Of course, see what causes the errors for yourself, but if you don't know you SHOULD look up the answer. You run into errors all the time as a software developer, so this video is right that you shouldn't be too scared of them. But, also don't feel bad for needing to look them up. Overall, I think it's better to avoid errors in the first place by keeping your workspace clean and consistent. Veteran coders only got to a point where they can interpret errors because they once looked them up, so if you're a beginner and you don't understand an error -- don't worry. It'll come with time~