Just to confirm, are you able to hear audio on the local file? Also, let us know if these steps helps: https://goo.gl/iVMeBY . Let us know.
Hmm, could you try reuploading the video using a different device to see if that helps? Keep us posted.
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Hmm, could you try reuploading the video using a different device to see if that helps? Keep us posted.