My first thought was naturally April Fool's gag, but judging from the date on the video they're more than two weeks late. And besides, I'm not even certain the French go in for all that silliness.
Now this isn't to say I've completely ruled out the possibility of a corporate spoofing but let's run with it for now.
The idea is that some Citroen DS cars will be attached to hydraulic actuaters along the Parc des Princes touchline. This will enable them to be raised up to 30 metres in the air and tilted for optimum viewing angles. Check it out.
Probably bollocks, innit?