It's the quality of the camera. It probably was a cheap camera. It's the kind that they'd shoot for some online exclusive or something so I assumed at first that it was a Dereon ad.
But let us not forget that she's working with Francis Lawerence & he knows about camera quality. The teaser was probably just some extra footage for online campaign purposes.

Michelle Obama: All of you love Beyonce, right? ME TOO!

She gets Barack to do the Single Ladies hand & Michelle to do the Move Your Body routine.
only the Queen.

Sweetie this is old news, it was uploaded last month.