Hi,
I have made tests and that is no possible through the admin panel. But the video can be added in the theme editor.
If you want, you can create a new user to me in your admin panel. In that way, I can modify the code on site. I have done this with other users and there were no problems. You can trust me. I only want fix this problem. You can send me the information to my email admin@creabox.es
Regards