Videos in larger screen mode

How do I make the video bigger?

On a smartphone: 

Press the two arrows pointing in the opposite direction of each other in the top right corner to open full screen mode, and then turn your smartphone on its side to make the video bigger.

On a computer: 

Click on the two arrows pointing in the opposite direction of each other in the top right corner. From there, it will automatically open to a full screen mode and make it easier to view.