If you had published an hidden video, this means that you need to have the URL to see the video, you will certainly need to find the URL even after having publishing your video.
First, go on "Publications" and choose the video you want to take the link, select the video with the pen.
Then on this page, select "share" in order to find the link. You just have to click on "Copy blog url" so that the URL is in your clipboard.
The link is in HTTP, but if you need to have it in HTTPS, you just have to copy/paste the link in your navigation bar, press "enter" and you can take the link in HTTPS in your navigation bar.
Finally, you can copy/paste it in your clipboard in order to send the link to someone.