Takes video fine but saves it weird

This app was appealing to me cause I always wanted to make videos with fisheye lens. I tried it out and was quickly disappointed. It takes the video just fine and everything but when it saves the video it turns out funny. Usually the saved video is black or wavy you cant see the recording or the fisheye effect. All you can do is hear the original audio. This app would work wonders if the developers fixed this major bug? Could I be the only one with this problem or have others experience for similar problems? I wouldnt suggest buying the app until they fix this. Thanks

Kirsten1996Forever about Fisheye Video Camera