An iFrame, or inline frame, is an HTML element that allows a website to embed another HTML document within the page. iFrames are commonly used to embed videos, maps, and other types of external content on a web page. This allows the content of the iFrame to be independently scrolled and resized, and can also help to isolate the embedded content from the rest of the page. iFrames are supported by most modern web browsers, and are easy to use. However, they can also be a security risk, as they can be used to include potentially malicious content on a website without the user's knowledge. Some services such as Teyuto allow video iframes to be posted only to certain and specific white-listed websites/IPs.