Minstrel Spirit's "Winds Are Cryin'" is a slow and melodic medieval song with vocals by Carolina Lindwall, who has a really beautiful voice. This would make a fantastic score for a movie playing in the middle ages...
Song: Minstrel Spirit - Winds Are Cryin' (4:01 min, 3.7 MB)
License: CC-by-nc-sa 1.0
...for this "slow and melodic medieval song". It remember to me that songs of Rob Roy by Capercaillie. I like very much this type of music.
thanks for the nice comment :) I downloaded a few demo songs from Capercaillie and they seem to be really good. Unfortunately the songs aren't free (as in Creative Commons), so I can't play one of them here... That's why I played another one by Minstrel Spirit for you ;-)