This seems like content suitable for beginner QA professionals.

This lecture helped me understand aspects I vaguely knew but hadn't looked at closely. Thank you.

The difficulty level is disappointing!

This would be a good lecture for someone encountering QA for the first time, thinking of it as an introduction. It mainly covers what test cases are, why they are needed, and how to brainstorm and develop them. The difficulty is labeled as beginner, but it feels more like introductory.

After joining this company, I didn't know where to look for QA-related knowledge, but this lecture provided great tips!