I got a few comments on this post last week asking me to clarify step 4, so this is my attempt to do so.. it's sort of tough since I can't see the back of my head while recording (hence the weird attempts to get it right in the first 15-20 seconds, lol.. sorry about that) but I tried, and I really hope this helps!
The trick is to insert the puffy pony/hair comb right above your ponytail in a downward motion towards the front of your head, and then you wiggle it until it's really tight and locked in place. You can feel when it's working because your ponytail doesn't flop around anymore, it stays in a tight bun. If you have any more questions please let me know! :)