The Duchess of Sussex at the launch of her new fashion range

The video begins with expressions of gratitude and happiness. It then transitions into a discussion about decision-making and the importance of adapting to changes. The conversation shifts to the rarity of big brands collaborating and the significance of prioritizing purpose over projects. The video concludes with a casual conversation, including greetings and small talk about the weather.

What does the speaker imply by saying 'it's also really rare'?

What is the significance of collaboration mentioned in the text?