Very much so. WebMはロイヤリティフリーのウェブコンテナで、VP9またはAV1ビデオとOpusオーディオを含み、現代のすべてのブラウザでデコードされます。. That determines both the headroom available and whether the saving costs you anything in fidelity.
透明度の決定は，透明度の変更を行う段階である。 That is the step most people actually came for, and doing it after WebM を圧縮 rather than before it means the conversion works from the file you finally settled on.
