For checking the transcript: https://www.buzzsprout.com/2379282

First and foremost

 is used to introduce the most important thing before talking about anything else. It’s a way to emphasize priority and what truly matters.

Examples:

1- A good leader should have many qualities, but first and foremost, they need to be a good communicator.

2- When asked about his success, Cristiano Ronaldo said, 'First and foremost, I am disciplined and always work hard.