CLEAN: In Vietnam, from dog-meat delicacy to pampered pooch

The video tutorial begins with an introduction to Amazon, followed by a discussion on new learning materials. It then covers the process of recording books and concepts of elevation. The video includes greetings and personal reflections, and concludes with final thoughts and summaries.

What does the speaker imply with 'Yeah. Mona.'?

What could be the context of the phrase 'Knock, knock.'?