The first commercial is for Taco Maker, a Mexican fast food restaurant. What they parody here is the Mii Channel. Note that the creators of this commercial paid very close attention to the original channel and replicated it in nearly every aspect, right down to the multiple face options and minor details like the plus and minus signs and the Wii pointing hand:

Translation: Make my mouth bigger, more, more, exaggerate it, more, there!

There is a longer version of this TV spot which has the guy talking to his girlfriend and going through more Mii options.

The second commercial comes from Radio Shack, and out of the two commercials this is the most cultural. The TV spot announces a special Three Wise Men sale and advertises the Nintendo DS at 129.99. In order to drive the point across, the commercial starts with the Three Wise Men jumping around in a Mario like level. This is of course a parody of New Super Mario Bros. Wii, due to how there are three characters jumping around the screen:

To give you a better perspective of the commercial, the Three Wise Men are collecting shoe boxes filled with grass, leaving behind a present (these presents happen to be products from Radio Shack). In Latin American culture, there is a celebration called The Three Wise Men day. Like Christmas, children receive presents from the Three Wise Men on January 6. As part of the tradition, children leave a box filled with grass for the camels to eat, much like how children leave cookies and milk for Santa. Its these details that make the TV spot a fun and weird one.

Hope you enjoyed this. My apologies for the video quality, but I don't have a video capturing device.