This tutorial covers how to put an image or video into a comment on WordPress.
Images posted in the WordPress Comment box must be set in an HTML image tag.
<img src="http://example.com/image.jpg" alt="Description of Image" height="150" width="200" />
The HTML tag links to the image, stored off the site you are commenting on. The image may be on Flickr, Instagram, a public image on Facebook or Google+ or stored on a web server such as your own.
As long as the image is stored on a publicly accessible server, and access to the server continues, the image will remain linked in the comment box. If the server status or image is changed or moved, the link to the image from that site will break and not be visible, possibly reporting an error in the comments on that post, so do this with caution.
This is of a starter reply comment.
How to add video to a reply comment in WordPress
First thing is to find out the code, (look below):
Tutorial on how to render a Photograph or Picture
This is of a second or etc. reply comment.
Just remember that you will have to cite where you got the videos and pictures, unless they are your own. Some video’s can’t be posted because they are not supported by WordPress. WordPress currently supports embedding videos from YouTube, Vimeo, Hulu, Flickr, DailyMotion, Viddler, Blip.tv, TED Talks, Educreations, Instagram, Vine, and Videolog. For more details, see WordPress Support for videos.