When thinking about video editing software, first consider what you want to do. Some programs only perform simple tasks, such as converting formats or burning DVDs. Others offer complex editing tools such as timeline edits, special effects and advanced templates.
Also, keep in mind that video editing can task your computer, so you may need to upgrade your computer to run the program you want and you will need sufficient memory to work with video files. So look into the system requirements carefully before purchase, so you don't end up buying a program that your computer cannot run or that underperforms on your computer.