From Zdemian, a set of tits that adjust to the bra size. Click it. 
There is traditional ways of putting on a bra, but then there is the way Beshine does it as you no doubt saw in that one video. Hanging before her feet, she steps into what appears to be a tiny garment and pulls it up as if it were stretch shorts until it is around her waist. Though t is incredibly stretchy like pure Spandex, it does take some effort to stretch each cup area over each boob, one at a time, as they seem to be stretched to their limit; the audible snap telling just how stretched it is. The shoulder straps are no more than stretchy rubber bands to hold the garment up, easily stretching over her shoulders. Unlike traditional bras intended to lift and hold the breasts, her bra, which is more like a sleeveless low-cut Spandex tank top, serves as a binder, just to reduce the amount of wobble and movement as she moves; you can imagine what a couple 40# weights would do for your balance if they unexpectedly swung in one direction.