App like Flipgram and Instagram?

So I downloaded Flipgram, it lets me create a video but it won't let me add music! Where can I find one that does? Also, I downloaded the newest instagram 6.0 app and I'm running the latest official OS on my passport, but it keeps crashing when I try to upload a picture or video! help please

I tried Slidegram, it may work for you, but it crashes when exporting into a video file for me.

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