What is the best free video editing software?

I’m actually looking for free software that allows me to convert a .VOB to a video format that Windows Movie Maker can open and edit (MPEG, AVI etc). I have tried a few programs (like Nero but the converted video file only has audio with a blank screen.

You may try this AVS Video Editor which has many great functions. The features in the official site are below:
1. Direct Transfer to iPod, PSP, Mobiles and Other Portable Players
2. Supports Virtually ALL Video Formats
3. Burn Movie DVDs
4. Capture and Edit Video from External Devices
5. Edit Video and Enhance Your Movies
6. Create Slide Shows
7. Make Perfect Audio for Your Video Editing Tasks
8. Scene Detection
9. Convenient Video Editing Tools and Interface

There is the free download link:

http://www.avs4you.com/AVS-Video-Editor.aspx?sct=aff&ct=regnow&cid=189508

Also, you can google some other software:

http://www.google.com

Fischen.vob

MAGIX Movie Edit Pro MX Plus $60.99 MAGIX Movie Edit Pro MX Plus offers more: More tracks more functions and more templates for perfect videos in no time! In addition to the advantages of the MX version the Plus version offers exclusive options for turning your footage into unforgettable movies plete with high- quality effects animations and impressive 5.1. Surround Sound.Advantages of the Plus version: PLUS! Professional video edit…

Movie Edit Pro 17 Plus $31.48 MAGIX ENTERTAINMENT CORP. MOVIE EDIT PRO 17 HD PLUS MOVIE EDIT PRO 17 HD PLUS…

Vegas Movie Studio 8 Platinum Edition [OLD VERSION] $129.95 Vegas Movie Studio+DVD Platinum software offers everything you get with the standard version such as easy drag-and-drop video editing, integrated DVD layout and burning, and Show Me How interactive tutorials. In addition, Platinum Edition provides added features, advanced editing tools, bonus video effects, and comprehensive training to speed you through even the most complex movie projects–from …