Per the clip that appeared Monday on YouTube:
Dave is a creative writer who lives inside the iconic Astor Place Cube in New York City. The cube's 8X8 panels add up to 64 square feet which adds up to 512 cubic feet. For Dave, who is 5'8", that is plenty of space to move around, write, cook, sleep, work out and even play guitar. Dave uses a bicycle generator to power up the lights and a handful of electronic gadgets.
Cute enough, though it's not for real... per Business Insider:
The video appears to be an elaborate advertisement for WHIL, a company that promotes meditation in the business community, started by Lululemon Athletica founder Chip Wilson and his wife Shannon (a logo for WHIL appears at the end of the video.)