WTF: “Get Down And Dirty With A CBS Food Fight!”

I was looking for preview clips from tonight’s How I Met Your Mother (not up yet) when I came across this totally wtf CBS promo, promoted on their website without explanation and added by CBS to YouTube. It’s a montage of clips from new shows like Mother and Two And A Half Men and old ones like MacGyver (?) that involve food in some way. And it’s set to some kind of mariachi music. And for this reason, it’s a “CBS Food Fight”. Can someone explain why this exists?

If it wasn’t on the CBS site, I would think it was put together by some old lady in her basement.