-1
You can use the property clip-path.
<!DOCTYPE html>
<html lang="pt-br">
<head>
<meta charset="UTF-8">
<title> </title>
<style>
.teste{
background: url('https://d2v9y0dukr6mq2.cloudfront.net/video/thumbnail/HPWsSXb4xiwrj8lkx/videoblocks-tropical-beach-background-loop_bhjouqunm_thumbnail-full01.png') no-repeat center;
-webkit-clip-path: polygon(50% 0%, 100% 0, 100% 75%, 51% 71%, 0% 75%, 0 0);
clip-path: polygon(50% 0%, 100% 0, 100% 75%, 51% 71%, 0% 75%, 0 0);
float: left;
width: 100%;
height: 300px;
}
</style>
</head>
<body>
<div class="teste"></div>
</body>
</html>
In case it is duplicated from the other, just invert the values you will get the "arrow" pointing to Ima
– hugocsl