AV1 is a relatively recent video codec build by the Alliance for Open Media (AOM) [https://aomedia.org/]. It provides a encoder that beats H264 in file size for a given quality, and is significantly less patent encumbered than H265 – H264's successor. For completeness, AV1 competes quite favourably against H265
Continuous Integration/Continuous Deployment is a cornerstone of modern software engineering methodology. In short, the goal is to always have recent builds of the software available to test against. These builds are automated and the build system runs a series of automated tests run against them after a successful build.