Windows Movie Maker Help

[Glaceyon]

gaia_diamond ▇ ▇ ▇
ო σ σ n ч (the diamond dust p r i n c e s s )
You’re a s h o o t i n g star I see
A vision of ecstasy . . .

Hello, I am in a bit of a dillema.
I've been wanting to make some amv's, and I use Windows Movie maker (The vista version) on Windows 8.
I use Free Dvd video soft youtube converter to get my clips, but once I try to upload them onto Movie Maker, they do not show up at all, but if I open them on windows media player, they still work. What do I do, or does anyone know of any good free video editing software like Movie Maker?

. . .When you hold me, I’m alive
We’re like d i a m o n d s in the sky
▇ ▇ ▇ gaia_diamond