This FREE app is specifically designed for sharing MP3 as Video.
It's a simplified version of Music2Video which allows you to convert a single MP3 to video with no photo and text needs.

It:
1. allows you to choose any portion in music files easily by simple tap and drag. Most popular music/sound files(mp3/wav/m4a/...) are supported
2. allows you to add photo(jpg/png/gif...) and text by simple touch and adjusts duration automatically
3. even supports repeating a GIF automatically to fit music length
4. lets you add simple effects & transitions
5. allows you to upload video(480P/720P/1080P ) to popular video site
6. allows you to share the video with other apps in your phone

This app is still in development and any suggestions are welcome.