https://lazy-load-iframes.firebaseapp.com/youtube.html https://webpagetest.org/result/191208_YF_b9dd86e8b2de966bb8b3519050eccfdf/
https://lazy-load-iframes.firebaseapp.com/youtube-lazy.html https://webpagetest.org/result/191208_79_44c47b3420918013dd3c894040ce30a3/
https://lazy-load-iframes.firebaseapp.com/facebook.html https://webpagetest.org/result/191208_1T_9eb5f8c5ef882eedeae6b3938be2a1ea/
https://lazy-load-iframes.firebaseapp.com/facebook-lazy.html https://webpagetest.org/result/191208_3A_e60d63dde29992f01e3718278bf5175b/