That's a really poor video. It omits a lot of important details
https://www.youtube.com/watch?v=43tQws4t2pY is better, however note that you do NOT need to remove the display half, it's also no brilliant idea to do that since you had to mess with the flex cable and the flimsy B2B-connector, and you most likely will damage that flex when all you got for instruction is that tekseven video. Just loosen the 4 Phillips screws holding the display half a 2..3 turns, but do NOT completely unscrew them