It's simple to post videos from YouTube anywhere on GI.

You'll find a button on the left of the button-bar which appears when composing a post or a reply, labelled "YouTube".

With the cursor in the box where you'd type your post, just click this button, which will insert the simple BBC code for your video, thusly:

[YouTube] [/YouTube]

Then simply paste the URL of the video you'd like to include between those tags, like this:

[YouTube] http://www.youtube.com/watch?v=I0WNPb8R-40 [/YouTube]

Our software will then insert the code to include the video itself right at that point in yuour post!

That's it!

(But please observe the goals behind the differing Themes of various Areas of GI. Thanks!)