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Header set Content-Security-Policy "frame-src https://www.youtube-nocookie.com https://www.youtube.com" |
The Content-Security-Policy header must not be overridden.
There is now a standard way to add local exceptions to the CSP:
https://infra.apache.org/tools/csp.html
Please update the .htaccess file accordingly.
Please note that the policy says that any exceptions must have been approved, and a reference to the approval must be commented in the .htaccess file