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Stylistic Suck - Intentionally making something (anything) in the work low-quality. For example, a Show Within a Show.
Could sometimes be Offscreen Moment of Awesome if the Show Within a Show is said to have a massive budget and the most amazing battle scenes ever, but we never see one second of it.
Pac-Man Fever has a broad reach as far as video games being portrayed incorrectly in a show (too old, playing it wrong, wrong sounds, etc.).
Edited by KDif it's not stylistically bad, then a general Informed Attribute is at play; we're told it has a big budget but not shown. Take Our Word for It could apply in the same scenario as Offscreen Moment of Awesome

A TV series features a metafictional work that's supposed to be impressive, but since the show doesn't have a big budget, the Show Within a Show can't have one, either. Usually this applies to blockbuster movies on in-show games, that look very crappy.