You can tell that the walkthrough is being played on a PS3, because the "A" button is a green circle. On a Wii, the "A" button is a white circle.
Gameplay is the same for all platforms, unless you want to start a "New Game".
When you get that far, ask about the differences.
Here is the walkthrough. Like Nike's slogan, "Just Do it"
If the YouTube walkthrough you have been viewing is not split screen, with a line down the middle, with Mickey moving on the left side and Oswald moving on the right side, then it is Single Player, with one player using one controller. Oswald is moving automatically.
IGN has good pages, walkthroughs, and videos.
For the Written Walkthrough, when you get to that site, Press Prologue to get Yen Sins Lab
Their videos have GUIDE in red beside the beginning, and the Part #.
The YouTube video for IGN is at
Part 2 is
Part 3 is
But, I recommend just wandering around, and taking it easy on spraying thinner.