Namo Media was all done with illustrations, no 3D or even faux 3D required. The second video looks like an Element model with the textures set to flat (Illumination 100% and checkbox for diffuse color selected). To do an animated screen with Element, there are tutorials for that. It would be easier to search for one of those instead of giving you a step-by-step process here.
C4D is great for the flat 2d colors and such, but takes some real practice and time to make it look beautiful. EJ at eyedesyn.com has a lot of awesome tutorials on that, but you need C4D studio to render the stuff.