This is more like patience test to see if we can watch the full 1.5 hrs video. I did rather badly in patience test. I only managed to watch for few seconds only. Let me test my patience again later.
Frankly, I have better things to do. YouTube will let you slow the video down to .25x playback speed if YOU want. Click on the gear icon at the bottom of the page and change the speed settings. Also if its not fast enough, you can even make it faster!!