HTML in Unity? Show webpage in the scene?

What about embed a browser in Unity? (for Android)
Or at least, develop with HTML for some functionalities.

I want to show a video with tag and a map with EON-Map and a website

Try Awesomium

Check out my 3D WebView plugin for Android, iOS, Windows, macOS, and UWP / Hololens. I use it for all of the web, UI, and video rendering in my VR Browser app. You just add instances of the plugin’s webview prefab to your scene, and it takes care of rendering the web content and handling user clicks.