I am not able to see that video but here i have created a sample which keep the div tag position fixed when you scroll down according to your explanation.
You can also refer this link i have just added the Button and TextBox in Div tag.
HTML
<html>
<head>
<title></title>
<style>
body
{
font-family: Arial;
font-size: 10pt;
}
</style>
</head>
<body>
<div id="dvSource" style="border: 1px solid #000000; width: 150px; padding: 10px;
display: block; position: fixed; top: 50px; right: 50px;">
<input type="text" name="name" value="" style="margin-bottom: 10px;" />
<br />
<button>
Search</button>
</div>
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</body>
</html>
Demo
