I watched the vid....Looks like they are ventilating new strands onto the clients hair strands...Instead of lace...ie: wig making.This poses the very real issue of new growth.
Soon as the hair grows...Assuming the clients hair grow the average of 1/2 in a month.....Or more for fast growers, or less for slow growers.....Three months time and it's over. It will need to be redone. Or accept it as temporary.... Ie: want to look good for a wedding...And call it a one time expense.
Go simpler....Lace wigs.
Much cheaper and with proper care...Will last for years.Signed, A lace wig maker.
Review about: Hair Club Xtrands Hair Treatment.
Reason of review: Bad quality.