Connector reliability and mechanical strength is a big problem here. If the baseplate had screw holes with threaded inserts, so you could screw everything down, it would hold together better. Also, the animation looks cool, but there is no power source, and no external connections.

Google tried this in 2015. It was called Project Ara.[1] A similar click-together system, with the same problems. Plus the problem that there's no good reason to make a phone that way. Google acquired that from Phonebloks and killed it.[2]

It's not a bad idea if you solve the mechanical problems and have the components produced in sufficient quantity to be very cheap. A little bigger, a lot more rugged, with a good wire management solution, and you'd have something useful.

[1] https://www.cnet.com/tech/mobile/project-ara-everything-we-k...

[2] https://www.onearmy.earth/project/phonebloks