Skip the battery part go straight for the HD, as it is no relevance to the point of the process. Also cuts the time in half to about less than 10 minutes!
Just to remove the Lightning connector assembly, it is very not worth the effort going thought a field strip of the whole thing as it can cause damage!
the Video should concentrate at the problem in hand.
Removing the assembly at the top and the logic board may cause further untold damages!
Why do I need to remove the airport card? It's just like telling somebody to remove their shoes to take off their hat?