The A bike folded beautifully, and was fun to ride, on supersmooth tarmac, for about 50 yards. Not a bike for serious real use.
We took a couple of Stridas to Spezi this weekend, and most of those who rode them felt thay were ok at a certain speed (about 8mph), on a smooth surface, but that it was very twitchy.
Of the people on out trip that brought their own folders, the Brompton had a majority. I think there's a good reason for that...
I can't watch youtube very well, so I haven't seen all of that first video, but what I saw looked like the usual 'concept' bike - all bells and whistles, but not actually useable...