Any chance you would be able to point me to a good source or article describing/explaining the first half of your comment? I.e. someone getting into the nuts and bolts?

Netflix is a platform - their strategic advantage is in their content sourcing and development pipeline which is fed the unique insights on audience preferences. This is distributed with recommendation algorithms and UX. It could be argued, like someone also already pointed out, that this infra aspect is a commodity at this point.