Here’s a paraphrase of your text:
“The moment that wasn’t aired on television during the live broadcast was the news about Mbappe leaving Real Madrid due to Rudiger’s unexpected reaction after Mbappe scored his first goal for the club. Rudiger rushed over to celebrate and congratulate Mbappe on his first goal, but then….”
The footage that wasn’t broadcast live on TV was about Mbappe’s departure from Real Madrid, which was triggered by Rudiger’s unusual reaction after Mbappe’s first goal for the club. Rudiger rushed over to congratulate Mbappe on his debut goal, but observe the peculiar approach taken by this eccentric German.