Instagram video format

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Hello,

I have been trying to download video to my IGTV account. I have used a video editor using a video format size of 1080 by 1920 px vertical.

Unfortunately when viewed in IGTV in my Motorola mobile device (android) it clips (cuts) the sides of the video. But when viewed in my PC (toogle device tool bar), its fine. I have ask my wife to view it on her Samsumg Android device, it also cuts the sides of the video.

Does anyone know how to resolve this issue?

Thank you //Rodney