I'm not a PM nor hiring one but in my opinion you didn't answer the question. If the aim of the question is just to not answer the question and just raise more questions then it's a poor interview question in my opinion.

And from looking on Twitter, it's confirmed, imo, it's a bad question:

"As a lot of you have figured out instantly - this is really a iceberg question. Looks like a simple UX problem but is really about trying to understand Netflix as a system and as a business."