Step 4 has a Video URL field. The placeholder shows the two accepted forms: https://youtube.com/watch?v=… or https://vimeo.com/…
- Upload the video to YouTube or Vimeo first.
- Copy the address from your browser bar.
- Paste it into Video URL.
You cannot upload a video file directly. Paste a link to one of those two services.
Getting the right link
- On YouTube, press Share and copy the link, or copy the address from the browser bar.
- On Vimeo, copy the address of the video page.
- Paste the whole address, starting with https://
If the video does not appear
- Check it is set to Public or Unlisted. A Private video shows nothing.
- Check you pasted the video page address, not a channel or playlist address.
- Make sure the owner has not disabled embedding.