The Wii NAND cannot exceed 512 MB in size, and the DLCs for the Just Dance games that have them is way over that limit. The video you posted also links to a pirated WAD, so I'm removing it and issuing you a warning. Piracy is against the forum rules.
Avell A70 MOB: Core i7-11800H, GeForce RTX 3060, 16 GB DDR4-3200, Windows 11 (Insider Preview)
ASRock Z97M OC Formula: Pentium G3258, GeForce GT 440, 16 GB DDR3-1600, Windows 10 (22H2)
ASRock Z97M OC Formula: Pentium G3258, GeForce GT 440, 16 GB DDR3-1600, Windows 10 (22H2)