It was a single team for a very specific use case.
To be clear when I said that PrimeVideo is composed of hundreds of microservices, I actually meant that it's composed of hundreds of services, themselves composed, more often than not, of multiple microservices.
Depending on your definition of a microservice, my team alone owns dozens.
This comment shows how a very random blog about a very small part of a product can dominate all conversation about it. Prime video famously did not undo anything. Out of 100+ teams one team undid one service. But somehow similar comments are common on HN. I am making no judgement or microservice or not just on this particular comment.