Youtube video not embedded

The youtube video block don’t work all the time.
As you can see in the page https://www.alessandrodiruscio.com/how-to-get-free-traffic-from-facebook/ instead of the video, I have the link as a text.

Some other times instead, it works perfectly.

What could be the problem?

Alessandro

The page I need help with: [log in to see the link]