Need an EASY TO OPERATE video editing software.

So, Me and the wife are joining the USAF, I want to document everything that we are doing to prepare and all that other good junk. Is there a FREE decent video editing software that is noob friendly and will let me like take mp3's and cut a part of the mp3 and put it in the video somewhere? Also my videos are MP4 and my Windows video maker wont see MP4... So wtf. Im not a video editor at all and don't plan on making the greatest videos but, A few options and little gizmos would be nice. Help a brotha out.

 

If nothing else, you could use something like avidemux or I suppose SUPER to convert the mp4 to another format to then use in Movie Maker. Along with that, go here: www.doom9.org