How do i download Riverview on the sims 3?

If it is not under copyright then it's legal. Where is the file hosted? You can usually just use your web browser. For example, everything at archive.org is legal and you just select the file you want to download and save it.
I recommend you a free software which can help you convert Rip DVD and Convert Video to your iPod.
It called "Next DVD Ripper". It is easy to use, you only need select "iPod Move" Profile, Next DVD Ripper will convert the movie to suitable format that can be played by iPod.

It can Convert DVD to BlackBerry video for Blackberry Storm 9530 9500, 8800.

Next DVD Ripper is a free DVD ripper and video converter with easy-to-use graphical interface, fast converting speed, and excellent video quality. It can rip DVD movies and convert almost all video formats including DVIX, Xv iD, MOVE, RM, RM VB, MPEG, VB, DVD, MV, and AVI to MPEG-4 movie format for iPod, PSP, PS3, iPhone, XBox360, Zune, Apple TV, Archos, iRiver PMP, Epson Player, Creative Zen, Rubi Blue, Sony Walkman, Commodore PMX, Palm TX, Game Boy, SmartDisk, Windows Mobile Smart phone, Nokia, BlackBerry, Ketti, LG, Sony-Ericssonon, Samsung mobile phone, etc.
I recommend you Altysoft DVD Ripper, it so easy to rip DVD to iPod.
Altysoft DVD Ripper can also rip DVD to other devices and video formats, such as: iPhone, PSP, Zune, Xbox, Nokia, avi, wmv, 3gp, mov, flv and more into avi, mov, asf, wmv, mp4, 3gp and others.

A tool for GPhone and related users for rip DVD to GPhone supported formats, such as MPEG-4, H.264 GPhone video.

Altysoft DVD Ripper is a very easy and powerful DVD ripping software, which can convert DVD to various formats.
Altysoft DVD Ripper can help copy whole DVD to your hard diver, then you can burn them to blank DVD using burning software.
Yes, it's legal.

Free Video Sites For iPod, most papular video webs for ipod.

As iPod accepts only MP4 video fromat, you need to convert DVD to MP4 video on your computer, then transfer it to iPod with iTunes.
Just google a DVD to iPod converter, or you can try cucusoft iPod converter, it's a professional dvd to ipod converter that can convert DVD movie to ipod nano/touch/classic/video.