packages/video_player/video_player_android/example/android/app/src/main/res/xml/network_security_config.xml

<?xml version="1.0" encoding="utf-8"?>
<network-security-config>
    <domain-config cleartextTrafficPermitted="true">
        <domain includeSubdomains="true">www.sample-videos.com</domain>
        <domain includeSubdomains="true">184.72.239.149</domain>
    </domain-config>
</network-security-config>