Embeds can be resized on your webpage by adjusting width and height, and using the widescreen parameter.
Note: When resizing the embed, make sure to keep the width & height ratios the same, as shown in the example below.
Make the Embed Widescreen
To make the embed appear in widescreen, use the ?widescreen=1 parameter in the URL as shown in the code snippet below.
The embed on the left is standard, whereas the embed on the right has the widescreen=1 query parameter: