App for Iphone

I need a simple application for the iphone that is very basic asap. The song Harlem Shake has become very popular on youtube where people meke funny dance videos. The app will have a record button and once you press it it starts recording a video while playing the song then once the song is about to change the tempo stop recording and put record button again for second section of video. for more information my skype username is jack.henderson87. an example is [login to view URL]