Instagram help

How do I upload a 31 second video? I try and it says there was an issue importing your video.

I exported it from womdershare filmora application on my laptop. The resolution is 1280*720 the size is 21.5mb and it's MOV. Phone Post 3.0

I've only ever imported from iphone. No probs there. And i'm pretty green with social media.. Phone Post 3.0