The Mendix server will not help you to do video streaming. Streaming and forwarding live video is a complex solution and could probably not build from scratch but should use a 3rd party solutions that can be integrated in your app.
To implement this in the Native module you might need to some effort.
Or use the web view widget https://docs.mendix.com/appstore/modules/native-mobile-resources , might give you an quick escape to embed some HTML
To learn how to build a widget for the native apps, you could follow this tutorial https://docs.mendix.com/howto/extensibility/build-native-widget