In this article, we will show that the FPGA-based real-time VP9 encoding can deliver at least 25% bitrate savings compared to the highest-quality H.264 encoders deployed in Twitch’s production today.
然後提到 1080p60 至少省了 25% 的頻寬 (這邊應該是相較於 H.264)：
VP9’s Compression Efficiency for Live 1080p60 Encoding: We Can Achieve At Least 25% Bitrate Savings
VP9 is implemented in these web browsers:
Chromium and Google Chrome (usable by default since version 29 from May and August 2013, respectively), Opera (since version 15 from July 2013), Mozilla Firefox (since version 28 from March 2014), Microsoft Edge (as of summer 2016).
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