[AC Question]

Hi,
I've searched across the interneth, but without any success, so I've decided to ask you for help.

I'm building some kind of a router/radius/captive portal AP.

Everything works fine, until I try to connect on that wifi with my android device.
The "landing" page of captive portal, should play a video, but in Android, it opens that page within app that controls wifi, not in my browser, and it cannot play video. I use Android 7.0 but it doesn't work also in 6 and 5.
So, my question is, what can that "browser window" play? Video on html site can't, but can it play PHP? Or can someone give me any solution on how to play video, without changing settings on android, because I need this to work on any android device.

Thank you!