Video - problems to insert

Hi! I need some help.
Currently I haven’t been able to insert videos of my works in Readymag.
My plan is free so I don’t know if there’s a limited number of videos I can show…
I copy and paste the url of the video hosted on my youtube, however, nothing appears on the page.
This is the url of the video I can show in Readymag:

Thank you so much!