The div isn’t curved. There must be an overlay/graphic or CSS that is creating the curve on the bottom of the image. You would need to create an image or inspect the page where you have this and see what CSS is creating that part.
Possible CSS (Video in a div, with additional divs at bottom housing this V):
Typewriter effect:
Webflow site that implemented typewriter effect:
https://preview.webflow.com/preview/sunlightis?preview=8abef7ba7504e335a361cf895e37a4dd