Have you ever heard about short music made just for the video?
I mean basically doesnt released in CD, I think
For the first video, the music is made by Musician called Carlos De La Vega, I got this info from the video uploader.
For the second video, I dont know.. maybe made exclusive for VS.. search here :
http://www.imeem.com/tag/victoria%20secret/playlists
Full playlist for VS musics