Netflix improves the streaming experience on Android devices
It's also worth mentioning that AV1 is a royalty-free codec, which means Netflix only paid once to be able to use it. Although the new codec is only available on Android devices, Netflix confirmed plans to bring it to all its platforms.
However, the company decided to prioritize mobile platforms because it's where the AV1's compression efficiency fits better. Keep in mind that not all Netflix content is streamable using AV1, but you can enable it by turning on the “Save Data” feature. This way, all compatible titles will be streamed using the AV1 codec, thus reducing your cellular data usage.