When you click on the reply name at the bottom right and it brings up the Add a Reply page. Type in a description in the Comments area, then go down below the Comments area and find the window slot with the title "Link Title" to the left of it. In this post I will call the utube video "12-25 Case". Look for it beside the word Link,at the bottom of this post and click on it and it will automatically go to the video. A caution here, some computers are not able to open the video, either because they are to slow or they do not have the proper video software. Next, open another window and go to where your favorite video is located. Start the video and while it is playing, copy the address in the address window above (where www.ytmag.com is now) in my case it will be utube something or other. Then come back to this page and paste it on the line window above "Link Title" called "Optional Link URL" then go to the bottom of the Add a Reply page and click on Preview Your Reply and Submit. You can click on the link to check it out before you click on submit if you want.