his country's interest, but which very much serve his

[güey]

May I ask two questions concerning this part?

1. It sounds like he says "interest", although it should be "interests" to match "serve".
2. Does he say "at the UN"?

The excerpt starts at 2:54

<...> Putin spoke of his childhood, telling us: "Fifty years ago the Leningrad street taught me a rule - if a fight is inevitable, you have to throw the first punch." There was nothing inevitable about this week, but Ukraine has felt that first punch, a punch Putin justifies in his country's interest, but which very much serve his. And as we've watched the violence, I think back to that criticism of the West at the UN in 2015 Putin said: "I'm urged to ask those who created this situation: do you at least realize now what you've done?"

 

[Barque]

1. It sounds like he says "interest", although it should be "interests" to match "serve".

I think he means "interests" but pronounces it "interess". He doesn't enunciate the t.

2. Does he say "at the UN"?

Yes.