Yes, Netflix and other video streaming services like Hulu are SaaS companies because they deliver their services — in this case, entertainment content — online through a web-based platform.
Some of Amazon’s consumer businesses are also SaaS services. They include Netflix competitor Amazon Prime Video, audiobook service Audible and its Kindle e-book division.
Moreover, Amazon Web Services (AWS), a subsidiary of Amazon, provides a suite of cloud computing services, many of which are used by other companies as building blocks to develop and deploy SaaS applications.