While the timing would have been right for this to be keeping the Dahon Curl D9 off the market (it's been shown online but vaporwear in terms of availability), the D9 showed significant innovation versus Brompton; Stiffer frame tube design I think, disc brakes, plus single sided fork with right front caliper mount to prevent axle pullout without thru axle (a feature shown on the Brom clone toward the end of the video). The Curl D3 and D4(?) were closer to the Brom design but still had a better frame I think and disc brakes.

Zizzo and others have brought bifold clones of Dahon to market, just as Dahon doubled their prices (foolish of them, the Business Sin of Premium Pricing, creates perfect opportunity for competitor to undercut them at less financial risk).