you will most likely experience moderate to severe amounts of clouding on all 30-40 inch TVs because these are "consumer size" TVs and are most (if not all) TVs in this size range are cheaply made, and use C-grade panels and electronics. Unfortunately, brand name manufacturers don't start making "premium sets" until the 46 inch range, such as Sony, LG, Samsung, and Panasonic.
You could do a few different things:
Return and get a replacement of the same set, Insignia is a Best Buy brand so exchanges should be quick and painless. Or try the pressure technique, however that did nothing for my 39'' TCL.
Return and buy a small Panasonic plasma, while not ideal for computer use because of burn in, will produce much deeper black levels and will eliminate all clouding issues.
Return and purchase a slightly larger, premium 46/47 inch set such as the Sony HX750/HX850, LG LM6700/7600 etc which will have a better panel and have significantly less clouding.
Unfortunately the third option will triple or quadruple your purchase price but whatever way you go, i wish you good luck!
EDIT: Darnit, i knew i should of watched the video. THATS HORRIBLE CLOUDING LOL! Return that TV ASAP, NO amount of "massaging" will fix that! haha