libvpx is the primary library for the VP9 codec. It allows for high-definition (HD) and 4K streaming with significantly lower file sizes compared to older codecs like H.264.
libvpx is incredibly efficient at lower bitrates compared to the aging H.264 standard. If you encoded S04E07 at, say, 1080p using a Constant Rate Factor (CRF) of 30, you would find that libvpx manages to keep the file size manageable without turning the Scottish highlands into a blocky mess. outlander s04e07 libvpx