node_rename.js

const fs = require('fs')

const files = fs.readdirSync('./')

const trecFiles = files.filter(file => file.endsWith('.mp4'))

const start = 1

trecFiles.forEach((item, index) => {
  let seq = start + index
  if (seq < 10) {
    seq = `0${seq}`
  }

  fs.renameSync(item, `${seq} ${item.split(' ')[1]}`)
})