CLEAN : FILE: Top Philippine drug war critic arrested at Senate: AFP

What is the primary focus of the initial discussion in the video?

• The history of crystals

• The uses of crystals

• The chemical composition of crystals

• The concept of crystals

What does the speaker mean by 'I mean' in the context of the video?

• Introducing a new topic

• Ending the discussion

• Clarifying a previous statement

• Expressing uncertainty