Way back in 2015 Netflix announced it would team up with Amazon, Google, Intel and other companies to develop a royalty-free codecs that worked well on modern devices. Two years ago they revealed the fruits of their labor as the AV1 codec, that promised not only freedom from licensing payments they wanted to avoid, but also a saving of up to 30 percent on the amount of data used to stream 4K HDR video. Now, Netflix has started using AV1 on a "select" set of titles, and only for users on Android who've enabled the "Save Data" feature.