CLEAN : S Korea marks the second anniversary of the Sewol ferry disaster

The video tutorial begins with an introduction to the topic, mentioning Costco and setting the context. It then moves into a discussion about video content and future plans, including a mention of marriage. The tutorial concludes with reflections on the difficulty of the topic and performance measures.

What does the statement 'It's hard.' imply about the speaker's experience?

Discuss the meaning of 'Performance measure.' in the context of the text.