The first video may very well show the casing for the iPad 5, though please take those words with a grain or two of salt.
Unlike new iPad images picked up by FantasticFone, the silver back here has a transparent or translucent logo. There's a screen on this case too, but there's not much to gather about that particular piece.
The second vid may show the budget iPhone. The back cover is clearly plastic, and the device shown looks to be about the same size as the iPhone 5.
We also get a look at the front of the device, and while it's not earth-shatteringly revealing, we get an idea of what the iPhone 5C would look like with a dual color scheme - white rear casing and black front bezel.