I haven't tried it yet but you can now insert YouTube videos into your post. See the button above the 'Start New Topic' text area. Usually, that means you can view the video without leaving the Forum. Unless someone beats me to it, I'll give it a try the next time I see an educational or entertaining YouTube video.
Thanks for the tip, Jason.
I just have "New Topic" showing on my page. Once I click on that, then I do see the tiny icon, to insert the URL of the YouTube video.
Correct, you have to be making a new post in order to get the formatting options, such as inserting a YouTube video.