code: function timeCode(seconds, delim = ':') {
      // const h = Math.floor(seconds / 3600);
      // const m = Math.floor((seconds % 3600) / 60);
      const m = Math.floor(seconds / 60);
      const s = Math.floor((seconds % 3600) % 60);
      // const hr = (h < 10 ? '0' + h + delim : h + delim);
      const mn = (m < 10 ? '0' + m : m) + delim;
      const sc = (s < 10 ? '0' + s : s);
      // return hr + mn + sc;
      return mn + sc;
  }
docs: /*
  Format seconds as timecode string