If you want to convert DVD and edit movie to iPhone, you can refer to this page:
http://www.aimersoft.com/tutorial/dvd-to-iphone-converter.html

Now let's begin with the iPhone Video Converter guide:
1. Click “Video to iPhone Converter” to load the Aimersoft Video to iPhone Converter. Then click “Add” button to load video files. This software support batch conversion, so you can add several video clips at one time.



2. The operation is similar with DVD to iPhone Converter, this software can join several different video clips into one file, if you want to join video, just check the box “Merge into one file”. You also can customize the resolution, video bit rate, encoder, frame rate, audio bit rate, channel, etc in the setting panel by clicking the “Settings” button. The program also let you create a profile and save it, then you can use different settings for each video clips.



3. Click “Start” button to start the conversion after you finish the settings.

 

Transfer video to iPhone

You need iTunes to transfer video to iPhone, if you don't have iTunes, you can download it from here for free

1. Open iTunes and click "File" to add your MP4 videos into iTunes library.
2. plug in your iPhone to computer, then iTunes will detect your iPhone as a device.
3. Select your iPhone device on the left panel of iTunes, click "Movies" tab, check the videos you want to sync and click "Apply", done.

Tips:
1. This software provides rich video editing functions for you to trim, crop and edit DVD movie. If you want to crop the DVD movie, just click the “Crop” button, and then you will see a pop up window (See the figure below). There is a frame in dashed line around the movie video; you can drag it to cut the black edges. More over, you can click the Crop drop-down list to select a Crop model you prefer, for example: “Cut off top and bottom black edges”. You can even type the number in the box to cut off black border accurately.



2. You can click the “Effect” button and customize the brightness, saturation, contrast, volume, etc (See the figure below). You can even apply special effects such as “Emboss”, “Negative”, “Old film” and “Gray” by selecting an effect from drop-down list.



3. This software can capture pictures from DVD movie, there is a small camera icon below the preview windows, click it when you preview the movie, it can save picture as JPEG and BMP.