I saw the same chair in a lounge area at Nordstrom. I wasn't sure it was the same one so I didn't turn it over (and risk glares from Nordstrom sales associates) but next time I'm there I will look. Pretty sure it's exactly the same. The frame looks more like round rod in the TV commercial--the Nordstrom chair was definitely a square profile rod.
Either way, theirs is a new production chair, not vintage. They don't vintage furniture there.
I googled "square metal frame lounge chair" and on the first page of image results there is a chair with the same frame but not in black. Not sure the cushions are the same dimensions but they are close. I'm not going to post the site because I'm not positive the design is original to them. But it's easy enough to find.
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