Nintendont is an unofficial homebrew software for the Wii and the virtual Wii accessible in the Wii U's Wii Mode. It enables players to run games from the Nintendo GameCube (GCN) using converted ISO files of the GameCube discs, the optical disc-based console emulation equivalent of the ROM used with cartridge-based console emulation.
VideoGameCollectionHD uses this software for its YouTube playthroughs of GameCube games for its ability to run at higher quality than the native standard and the ease and quickness of obtaining access to GameCube games rather than having to purchase the actual physical discs online and waiting days and weeks for them to ship. In contrast, VideoGamePhenom actually purchases the GameCube discs legitimately and runs them on its standard original Wii console while recording them with the Hauppauge HD PVR.
According to the style note listed on the official guide, the official writing style of the name is "Nintendont" and "Nintendon't" is incorrect, although common.
While this Wii homebrewing software program itself is legal in compliance with the copyright of its authors, it is generally considered illegal to download distribution ISOs of video games to be used in conjunction with it. Backup copies of the game dumped by the owners of the disc copy the ISO comes from are generally considered legal among fan hacking communities.