Getting error: Uncaught TypeError: n.fancybox.getInstance is not a function

Hello,
I’m trying to make it work but simply cannot. On page load I get error:

Uncaught TypeError: n.fancybox.defaults is undefined
    jQuery 14
        <anonymous>
        e
        t
        setTimeout handler*l/<
        c
        fireWith
        fire
        c
        fireWith
        ready
        B
        EventListener.handleEvent*
        <anonymous>
        <anonymous>

and when I click I get:

Uncaught TypeError: n.fancybox.getInstance is not a function
    jQuery 12
        i
        dispatch
        handle
        add
        add
        ke
        each
        each
        ke
        on
        <anonymous>
        <anonymous>

This was for clicking image.

When I create just simple text hyperlink on the same page I get: Cross-Origin Request Blocked: The Same Origin Policy disallows reading the remote resource at https://www.youtube.com/watch?v=Vpg9yizPP_g&autoplay=0. (Reason: CORS header ‘Access-Control-Allow-Origin’ missing).

Any help would be appreciated.

Thanks,
S@

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