const options = {
      advanced_features: [
        {
          name: 'custom_buttons',
          visible: true,
          data: [
            {
              buttonInfo: {
                name: 'MyCustomButton',
                // Material Symbols reference
                // https://fonts.google.com/icons?icon.set=Material+Symbols&icon.platform=web
                // Material Icons reference
                // https://fonts.google.com/icons?icon.set=Material+Icons&icon.platform=web
                materialSymbols: false,  // default false
                iconName: 'favorite',
                color: 'white',
                // should be inherited in like
                // .shaka-video-container .my-custom-button"
                cssClass: 'my-custom-button'
              },
              onEventType: 'click',
              onEventTypeHandler: () => {
                console.log('Hello! From custom button');
                // your code here
                }
            },
            {
              buttonInfo: {
                name: 'MyCustomButton2',
                // Material Symbols reference
                // https://fonts.google.com/icons?icon.set=Material+Symbols&icon.platform=web
                // Material Icons reference
                // https://fonts.google.com/icons?icon.set=Material+Icons&icon.platform=web
                materialSymbols: false, // default false
                iconName: 'download',
                color: 'green',
                // should be inherited in like:
                // "shaka-video-container .my-custom-button2"
                cssClass: 'my-custom-button2'
              },
              onEventType: 'click',
              onEventTypeHandler: () => {
                console.log('Hello! From custom button 2');
                // your code here
              }
            }
         ]
        }
      ]
}