Just in case you didnt see comment in Step 9.
Steps 9 to 11 > Be careful.. the NFC and Wireless charging might be stuck to the roof of the back panel. This will look very similar to whats in the video... the difference is that the cable goes away from you, rather than towards the top of the phone. The fingerprint sensor cable is very easy to disassemble, so if you feel resistance, heat up the back cover a little more.