I've never seen this video before and don't know its origins, but it appears to be a breast inflation gag in a stage production. It's pretty funny and at least a little bit exciting.
Oh, the humanity! Australia's Ralph Magazine has disclosed that 130,000 novelty inflatable boobs have been lost during shipment from Beijing. The boobs were to have been a free insert for the January issue (presumably to encourage people to buy two copies).
I fear a whole generation of potential Australian breast inflation fetishists has also been lost, as absent inflatable tits these young people will continue on their merry way, unscarred by balloon-like breasts being inflated before their very eyes.
[Storm in a C-cup - 130,000 boobs lost at sea - WA Today]
deep breath by ~zanfadar on deviantART
Pretty hilarious breast inflation fetish sequence, showing "Inflatable Girl" inhaling her way to giant breasts, which subsequently reduce when she exhales.