First find the video you want on a popular video site such as YouTube or Google Video. Then select and copy the "embed" code (usually found in a small window to the right of the video).
The embed code includes characters such as --
object width="425" height="344"> embed src="http://www.youtube.com/v/5UYabLi5Zgw&hl=en&fs=1" type="application/x-shockwave-flash" allowscriptaccess="never" width="425" height="344"
You don't have to understand the code. Just paste it in the place where you want the video to appear.
See this video on the need for long term care planning:
Add tags in the Tags window, then click Publish Post
and you're done.