Even though that video was in Korean, it somehow seemed to show the folding better than the 10 minute video Peter posted a while ago on the backer portal

I don't think it looked fiddly or slow to fold. It looked absolutely fine. The guy demonstrating the fold was showing how the locks work, not trying his hardest to unfold and fold the bike quickly, and with that in mind, I don't think it will take much more work than my existing bike. All the latches and things make it look safer and less creaky than my bike too, although I'll not know until I eventually get to ride one.