Video Youtube error when user enter for https

Hi, i have same videos in youtube, from an app grid my users watch videos fine if the url (site web) begin with HTTP: BUT if they enter with HTTPS, the video no show nothing.
I can see the message with Inspector Console:
Mixed Content: The page at ‘https://mysite.com/menu_main/’ was loaded over HTTPS, but requested an insecure plugin resource ‘http://www.youtube.com/embed/Pu4NzihyjRg’. This request has been blocked; the content must be served over HTTPS.

I Changed my urls of HTTP to HTTPS but no show nothing.

How can fix it?