I'm afraid I can't give you a definitive answer Ken, although hopefully someone will come
along with that in due course (because I am always eager to learn more), but I CAN tell
you how I did it before.
For my pics I've been using Photobucket as a host. It
also hosts video clips. So I took advantage of that when I wanted to upload a short video.
After uploading the video clip to Photobucket I was able to use it's option to copy the
direct link and then I used the Instant UBB Code for an image to add the link to my SOS
forum post, which then neatly displayed the video in an image window here.
Obviously, I haven't a clue how well it works with YouTube or the like but it might put
you on the right track.
When the going gets weird, the Weird turn Pro.