This is a free software video codec library from Google and the On2 Technologies VP8 and VP9 video compression formats. In the context of "The Penguin S01E01," it refers to the technical encoding used for high-definition streaming or file distribution.
A sample ffmpeg command that mimics a streaming-optimized encode might look like: the penguin s01e01 libvpx
If you're interested in the technical aspect related to "libvpx", here are some points: This is a free software video codec library
Episode 1 is visually dense: