There used to be a Tilt 700/900 model with an instant fold it was their high end model and a unique design to Decathlon.
There also used to be a Btwin model 500 which was clearly a badge slap on a chinese designed folding bike. Good solid bike although some low end components. Similar to the Carrera model in Halfords for the frame but with a much inferior freewheel based drivetrain.
Then Decathlon bought out a sort of Tilt inspired model to match the 700/900 series models but without the special fold and using lower end components than the standard 500 which is the model you have.
Clearly not a badge slap but their own unique design and maybe that unique design introduced additional costs which further reduced the quality of some of the components they could fit on it.
£80 is a huge bargain though for what it is. I personally would never have paid full price for one. Just looking at that video above at 1:20 into the video the derailleur looks like Shimano's worst derailleur the one they won't even show on their website and on the cheaper folding bike it only has an even worse sunrace derailleur. This is like the components you see on toys r us children's bikes. They seem like very low end bikes for me. The Tilt 700/900 was quite a classy folding bike though that didn't look compromised by poor components.
The 900 is still available over here at £400 although the image shows 700 on the bike. I believe its also the only btwin bike that has a decent rider weight limit which doesn't surprise me looking at that chunky frame and the large spoke count of the wheels. In fact that rear wheel looks seriously weird the way the spokes go to alternate sides on the rim, haven't seem that before. Actually ignore that bit I can see now that the wheels are actually both completely inline with each other so it looks like one wheel from the camera angle.
https://www.decathlon.co.uk/tilt-900...d_8328461.html