LinkedIn Course Downloader Script

linkedin-course-downloader.js

// go to the course page, press F12 and run this code in Java Script console.
// once done you get a list of video download links. Right click and save them or,
// download all at once with a tool of your choice (e.g. Chrome Simple Mass Downloader)
(async () => {

    let SELECTOR_CHAPTER_EXPANDERS = '.classroom-toc-chapter__toggle'
    let SELECTOR_LESSONS = '[data-control-name="toc_item"]'
    let VIDEO_LOAD_WAIT = 3000

    // expand chapters on sidebar except the first
    let chapterNodes = document.querySelectorAll(SELECTOR_CHAPTER_EXPANDERS)
    for (let i = 1; i < chapterNodes.length; ++i) { chapterNodes[i].click() }
    // get lesson nodes
    let lessonNodes = document.querySelectorAll(SELECTOR_LESSONS)

    // click each lesson node and grab the video source
    let anchorArray = []
    for (let i = 0; i < lessonNodes.length; ++i) {
        console.log('Parsing video ' + (i + 1) + ' of ' + lessonNodes.length + '...')
        let lessonNode = lessonNodes[i]
        if (lessonNode.innerText.toLowerCase().includes('quiz')) { continue } // skip quizes
        lessonNode.click()	// play lesson

        // wait and get video URL
        let videoURL = await new Promise(resolve => {
            let interval = setInterval(() => {
                let player = document.querySelector('video')
                if (player && player.src && !player.src.includes('0123456789')) {
                    clearInterval(interval)
                    resolve(player.src)
                    player.src = '0123456789'	// mark dirty
                }
            }, VIDEO_LOAD_WAIT)
        })

        let a = document.createElement('a')
        a.href = videoURL
        a.innerHTML = videoURL
        anchorArray.push(a)
    }

    document.body.innerHTML = ''
    anchorArray.forEach(el => {
        document.body.appendChild(el)
        document.body.appendChild(document.createElement('br'))
    })
})()