Video Factory doesn't have any specific fonts, it uses regular Windows fonts. Basically, whatever you can use in Word, you can use in Video Factory.

Windows fonts are stored in the "Fonts" sub-directory under your Windows directory. You can download many fonts from the Internet. The font files should end with a .ttf extension. Just copy those .ttf files to your font directory. I'll refer you to Windows help (Start Menu -> Help) for more details. Perhaps someone else can refer you to a good website where you can download fonts.