Help needed to post video.

I would like to post a utube video to show something I visited.
Can some one help?
I am using an iPad.
I can post photos ok and videos I've taken but I don't know how to capture/copy? the utube video to my photos area so I can then select it to post.
I'm obviously not that computer literate but I have visited some interesting places where the photos you take yourself don't tell the story as well as a professional video.
Thanks H.

When you go to the youtube video you want to post, click on Share (shown below the Youtube video), you will then be shown a highlighted link, copy this link, them paste it in a post here on the forum.