Okay, that sounded confusing. I need an app that I can record 3 or 4 videos and put them together (like a video collage) where they play at the same time. Like, for example, I sing, and I want to have one video of me playing my ukulele, another of me singing the melody, another of me singing a harmony, etc. Does anyone know what I'm talking about? I'd like an app or software for that. And if there are no apps, any editing soft-wares you know that I could do that on? Please answer- Thank you 
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