Replacing Zipper in Pants

This is how I replaced the broken zipper in my son's pants.

Whether it's 'wrong' or 'right', when it comes to sewing, sometimes what matters is the end results.

Part 1 Removing old zipper (0:46)
Part 2 Installing new zipper (5:57)
Quick tip (20:43)

I realized after I finished this video I forgot to show two small things. Both times, someone was walking into room which distracted me.
1: re-attaching inside flap near button hole. Since it is a short stitch line, hand tacking this would be very simple.
2. replacing the secure 'stops' in the flaps. This is easily done by matching marks left from removing old ones and making small and short zig-zag stitches to secure.