video export from UE4 to HTML5

Hi everyone,

I currently made an android UE4 package(v4.11) and had some video included, then I package it and export to HTML5. the export was a success but the video is just black screen and audio will be playing in the background.

I have tried video from .mov & mp4 still the same problem. btw I m using the sourcing media from UE4’s documentation site.

Any suggestion