Hi Peter,
Welcome to Permies.
I looked at the
video element you tried to post, but it is not valid YouTube URL. (
https://www.youtube-nocookie.com/embed/4ZitX5JZbmo) I tried searching for it using the id string, but still couldn't find it. So, I searched by your title.
Is this the video you were trying to post?
https://youtu.be/BYb2jJZF0-g
When posting, you
should click the YouTube Tab above the posting box and insert the video URL in this format:
https://www.youtube-nocookie.com/embed/BYb2jJZF0-g