Select all [data-name] items on the page and convert to array

Arrayfrom.js

const items = Array.from(document.querySelectorAll('[data-name]'));

Chain filtered.js

const filtered = items
  .filter(item => item.textContent.includes('Text'))
  .map(item => item.dataset.time) //data-time
  // map to an array of seconds
  .map(timecode => {
    const parts = timecode.split(':').map(part => parseFloat(part));
    return (parts[0] * 60) + parts[1];
  })
  // reduce to get total
  .reduce((runningTotal, seconds) => runningTotal + seconds, 0)