Hi Antonio,
Please check out the FAQ about How To Change About Image and Video Link? from the provided documentation to fix the issue.
The issue may be caused for &feature=youtu.be
after the video URL. You could try to fix the issue to delete this &feature=youtu.be
and use only the video URL https://www.youtube.com/watch?v=sfC_cfSMBOM
Best Regards,
ThemeLooks Support Team