Facebook video download with puppeteer example

getvideo.js

const puppeteer = require('puppeteer');
const { URL } = require('url');
 
(async () => {
    const browser = await puppeteer.launch();
    const page = await browser.newPage();
    const link = new URL('http://www.facebook.com/dcmjunior/videos/1794891250528272/');
 
    if(["www.facebook.com",
        "facebook.com",
        "www.fb.com",
        "fb.com",
        "m.facebook.com",
        "mobile.facebook.com"
       ].includes(link.host)){
        await page.goto("http://m.facebook.com" +
                         link.href.substring(link.origin.length, link.href.length),
                        {waitUntil: 'networkidle'});
 
        await page.click('#u_0_0 > div > div > div > div > div > i');
        await page.waitForSelector('#mInlineVideoPlayer', {visible: true});
 
        // Pega o link do video da página
        const videoLink = await page.evaluate(() => {
        return document.getElementById('mInlineVideoPlayer').src;
        });
 
        console.log(videoLink);
    } else {
        console.log('URL fornecida é inválida')
    }
 
    browser.close();
})();