Display webviewer by full screen

Hello.

I am making a bluetooth tank using ESP8266 Arducam and Arduino Nano board.

ESP8266 UNO board and OV2640 camera module receive video in real time.

Using Arduino Nano board and HC-06 Bluetooth module by allowing the tank to move forward and backward and change direction.

I am making an app with App Inventor 2.

Create a web viewer that receives video like the attached picture.

And i am making it to display stream data in ap mode from ESP8266.

​As a result of testing, images are transmitted normally and the tank is also well-controlled.

However,

When i actually run the app

the video in the web viewer does not display a full screen, because the Arduino Cam transmits a 320X240 size video as shown in the attached picture,

It was produced in the form of placing a web viewer inside a horizontally arranged layout.

Both modules are set to fit both height and width to the parent element.

Is there any way to get it to display on a full screen?

Thank you so much for reading my long message.

I would be very grateful if you could give me an answer that could help me.