I didn't mention it in the article, but the web component supports premultiplied alpha https://github.com/jakearchibald/stacked-alpha-video?tab=readme-ov-file#t

I didn't mention it in the article, but the web component supports premultiplied alpha https://github.com/jakearchibald/stacked-alpha-video?tab=readme-ov-file#transparency-looking-too-dark https://github.com/jakearchibald/stacked-alpha-video?tab=rea...