Topic: On what Android a player it is possible to change a ratio of the sides in a mode online?

As far as I know, in player MX Player in adjustments the Screen - the Ratio of the sides is 10 modes + 1 user. I wanted to check up it at playback of stream video (TV-channel in a mode online and Youtube). Delivered the user ratio 3:1, but on the screen changed nothing. Too most with others - flattening on verticals and a stretching at width simply does not work. It is only in words. In practice on the screen changes nothing. Check up please on Android the device this adjustment and if and for you does not work on what player it it is real (instead of in words) works?