Hi Tina
I have had expanders in since May 2013 and am having them exchanged in early March this year. My breast surgeon will go back through the original scar to replace. My incisions are quite different to that YouTube clip. As my surgeon does oncoplasty it is like a breast reduction scar. Comes down from where my nipple used to be and underneath my breast, so my scarring is quite invisible and he will only go back in thru the incision coming down from nipple area. Saw a friend in hospital yesterday who had a single mastectomy last year and exchange done yesterday by same surgeon as me and it looks fantastic. Good luck with your op. in few weeks.
Cheers
Fiona