How do I pu t music in my slideshows on movie maker and put them on youtube?

I cant figure out how to put music in my slideshows. and when i try to put it on youtube, it says i doesnt work! HELP!!!!!
Download, convert and save videos directly from Youtube and more.
Formats:

-AVI, MPEG, WMV, MOV,
-MP4 (Download faster in High Quality and HD) *Recommend
-3GP (Download faster for Phone)
-FLV (Download faster - Rename file .FLV - Example: Namevideo.flv)
-MP3, WAV (Audio Only)

1. copy the video url (Example: www.youtu . . . .)
2. go to Forinside
3. paste the video url in the url box
4. select format (AVI, MPEG, MP4, 3GP, WMV, MP3, FLV, MOV, WAV)
5. Click download

* Moreover, it can convert local videos on your PC in the formats above.
u need to convret the video to wav or wma, mp3 audio, then imported to windows movie maker.

I Use E.M. Youtube video download tool.

It works great and easy to use.

It can download video from youtube , myspace, veoh, yahoo or any other video websites autoamtically.

http://www.effectmatrix.com/Youtube_vide...

It can also convert flv video to any audio include MP3, wma,wav,ac3,mmf,amr,ogg,aac..., to any video formats include 3gp,avi,wmv, mpg,mpg4,asf,swf,h264,mov,jpg, that can be support by PSP,iPod,iPhone,Apple TV video,iTune,MP3,MP4,Zune,Cellphone,Digit... camera,DV,CD/DVD/VCD/SVCD.