test_w.mp4 appearing in Android gallery

[rivera2387]

Hello, I've searched the internet for this but I have not been able to find an answer. There is a media file that consistently appears in my galaxy s3 android gallery called test_w.mp4. I have attached a screenshot of what it looks like. It always appears in sdcard0, but I can never play it. I always delete it, but It comes back. I think an app is always creating it, but I am not sure what app it could be. Does anyone know what it could be? It is just annoying me that it appears constantly.