I hope I can help.
Go to a video you would like to copy.
Go to the link under that video.
Go to the embedd area which should be there around the video. Location varies from site to site.
Click on it and"Select all" and that will make the embedd info dark blue and highlighted.
Now press "copy".
Now go directly back to Forumgarden and only go to the "Favorite Videos" area on the left of the home page. You can only embedd a video on a thread at that location.
Now pick a thread there and post something. Under your post, press "Paste" and yes you will at first see all that funny writing. Now when you are ready, press "preview post" and you should see your video on your post. If you do have it, press "Submit post."
Life is a Highway. Let's share the Commute.