There is a big thing to keep in mind if you do this. Even by reading the book out loud (extensively) you are infringing on copyright unless the book is in the public domain (which it is not). The general idea of something you could do would be to post it as a "review" and mention the key reasons why you think this strategy guide is better than others.
You can show the cover, because I can't imagine anyone being upset about free publicity. If you post it to youtube you aren't gaining any money from it, and if it has copyright issues, Youtube notifies you and it is taken down.
I can't imagine Nintendo Dream going after a youtube video unless you went through page by page and continued uploading it. Since there are no audio-books of this strategy guide, you are pretty in the clear to talk about the book itself and parts of it.
EDIT:
There is a "Fair Use" rule for copyrighted material, and it is even more flexible when it comes to books, as it is nearly impossible to review without reading parts of it and such. The general rule of thumb is not a majority of the book, and not to generate revenue from your video.
Also, from Youtube:
What are the consequences of copyright infringement?
On YouTube, the consequences of copyright infringement are simple. We comply with the Digital Millennium Copyright Act (DMCA) and other applicable copyright laws. Under these laws, we remove videos when properly notified that they violate copyright.
If we receive a valid infringement notification identifying videos in your account, they will be removed and you will receive a strike. If you receive three strikes, your YouTube account will be terminated. At time of termination, all your other videos will be removed and you will be permanently blocked from creating new accounts or accessing YouTube's community features in the future.
In addition, copyright owners may choose to sue for infringement. In the U.S., copyright infringement may result in statutory damages of up to $150,000 per work and, in some cases, criminal penalties.
Just play it safe I guess.