The most powerful conversion software is TuneCab. It converts DRM-protected and unprotected music, films, video clips, audio books for playing on PCs, mobile phones, MP3 players, MP4 players and iPods, PDAs, PSPs and other devices.

TuneCab can convert:
- Windows Media Video (WMV) files to regular MPEG4 files (mp4)
- Windows Media Audio (WMA) files to regular MPEG1-Layer3 audio (MP3)
- YouTube Video to any audio/video
And these are only few examples of many available conversions.

Key features:

    * Selectable compression level and output format
    * Allows to convert complete folder structures and recreates these structures on output
    * Has YouTube Ripper and CD Ripper
    * Super fast conversion, up to 50x the playback speed
    * Can convert in HIFI and CD quality
    * Batch mode for converting or unprotecting large song collections
    * Very easy to use and install



With TuneCab you are not bound to your PC anymore and can play your music and movies on almost any device you have.
http://www.tunecab.com/includes/download.php

Xililsoft iPhone Video Converter is more suitable for you ! Here are some introductions for your reference ;
Xilisoft iPhone Video Converter is best video to iPhone format converter software to convert all video files such as AVI, MPEG, WMV, DivX, MOV, RM, VOB, etc. to iPhone movies. Xilisoft iPhone Video Converter helps you watch music video, movies on your iPhone and computer easily with great quality.

As iPhone music converter software, Xilisoft iPhone Video Converter can convert iPhone music MP3, WAV, M4A from popular music files, such as WMA, MP2, OGG, RA, AC3, APE, CDA. It can also extract audio from movies or music video and convert video to iPhone music MP3, WAV, M4A