So @jadedarmawangsa and I walked into the YouTube Space after talking with @TeamYouTube and things got super interesting!!!
Not today’s upload but you will wanna stay tuned!!! 

pic.twitter.com/yKq1WQpHkp
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Other than for high view channels YouTube actually defaults to AVC (H264) for the first-pass transcoding for most people. VP9/VP8 (I don't see much of that anymore) only kicks in after time/views or if you're 1440p+ unless it's changed in the past like 3 mo.s
VP8 was what made this error message disappear from the upload screen. “Your videos will process faster if you encode into a streamable file format.”
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