Sorts the disable_polymer=true Youtube Watch Later playlist by video length

sort-watch-later-youtube.js

/**
USAGE
1. Open the playlist you want
2. Right click > Inspect element > Console
3. Copy this and paste. Hit enter.
4. For watch later make sure to click the Edit button

EDIT: Not all playlists have hours.
*/

const table = document.getElementById("pl-video-table")
const rows = Array.from(table.rows)
const toSeconds = s => s.split(':').map(v => parseInt(v)).reverse().reduce((acc,e,i) => acc + e * Math.pow(60,i))
const getTimestamp = row => toSeconds(row.children[6].children[0].children[0].innerText)
const sortedRows = rows.sort((row1, row2) => getTimestamp(row1) > getTimestamp(row2))
sortedRows.forEach(row => table.appendChild(row))

// For also printing the total playlist length
let seconds = rows.reduce((acc,e) => acc + getTimestamp(e),0)
let mins = parseInt(seconds / 60)
seconds %= 60
let hours = parseInt(mins / 60)
mins %= 60
console.log(hours+":"+mins+":"+seconds)

// TODO: Handle NaN