Step 1. I opened the web page on basis of your url link: http://www.youtube.com/watch?v=xpPRt-g8A38

Stpe2. Found a text field labeled "Embed" in the web page.

Stpe3. Made one click inside anywhere of the text field to select all syntax, and then pressed down Ctrl + C in my keyboard to copy all the syntax at a time.

Step4. Pasted in text field of my new post by pressing Ctrl + V in my keyboard.

Step5. Located to html tag "" and found its properties “height” and “width”, then I changed values to scale a video size I prefered (you can skip this step)

Step 6. to publish my thread.