I have often had the same thought, but withought doing any research and only using that video I don't think the Cri Cri would weigh over the minimum amount to be loggable.
Otherwise people would be using ultalights to clock up SE time and the Cri Cri to log ME time. Approaching 'Easy' with a fATPL 300hrs on 172's/Seneca's and then 700hrs of Ultalight/CriCri time would probably still be classed as having 300hrs and not the 1,000hrs.
Would be a nice loophole if it worked though. But I assume it's classed as a Sport Plane / LSA?