To post a Youtube video, click the red 'Tube' in 'Add Tags' and insert the video URL in between the [youtube] and [youtube]. To post a photo click the 'insert image' (to the right of 'Tube') and insert the URL to the image.
Hope that helps
"If you're smart or rich or lucky maybe you'll beat the laws of man but the inner laws of spirit and the outer laws of nature no man can, no, no man can." ~Joni