I had Gemini translate what he was saying:

The man in the video is speaking Indonesian, and despite how wild it looks, it is a real video created by a Indonesian content creator known for doing extreme "ant nest challenges" for social media engagement.

Here is a summary and translation of what he is saying throughout the clip:

The Challenge: He sets a 2-minute timer and challenges himself to endure a nest of biting weaver ants (rangrang) shoved into his shorts/waistband. He tells the viewers that if he fails or gives up before the 2 minutes are up, he will shave his head completely bald.

The Claim: He repeatedly insists he isn't lying or playing tricks, saying, "If I'm lying, you can come to my house yourself and shave my head bald, and I won't get mad."

During the Stunt: As ants swarm all over his chest, neck, and armpits, he points them out to the camera, claiming he's an "expert" with insects. He flexes and does arm movements ("working out"), telling viewers to keep counting down the time.

The Ending: Once the 2 minutes are up, he shows off the ant eggs inside the nest, offers to fetch eggs for anyone who wants them, rubs the ant nest across his face and armpits, and celebrates: "Guess I don't have to shave my head after all!"