(written from a Production point of view)
Amazon.com is the world's largest online retailer, headquartered in Seattle, Washington.
Star Trek exclusive
Amazon Prime is a service that allows Amazon.com customers to pay a yearly fee for unlimited two-day shipping. As part of the service, Amazon offers a free e-book from its lending library each month and free video streaming of select older titles.
All of The Original Series, Star Trek: The Next Generation, Star Trek: Deep Space Nine, Star Trek: Voyager, and Star Trek: Enterprise are currently available to stream for free. Note that while the remastered version of The Original Series is offered in high definition, one must purchase the Blu-ray discs in order to see the remastered The Next Generation.
Amazon Prime is only available in the US.