21:9 support for HBO MAX (Ultrawide aspect ratio)

hbomax_ultrawide.json

{"userCSSoptions":{"theme":"default","font":"font%3A%2016px%2F20px%20monospace","width":"400","height":"300","dock":"right","opacity":"100"},"userCSSstyles":[{"site":"play.hbomax.com","styles":"video{\n  height: calc(100vh * 1.238) !important;\n  top: calc(-100vh * 0.238/2) !important;\n}","toggle":1}]}

hbomax_ultrawide_support.md

View 16:9 content as 21:9 on HBO MAX using User CSS

1. Install User CSS
2. Add this CSS for play.hbomax.com

video{
  height: calc(100vh * 1.238) !important;
  top: calc(-100vh * 0.238/2) !important;
}

Alternatively, load the json file attached to this gist.

Thank you!