Send origin referrer for YouTube embeds #4786
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Unfortunately, YouTube blocks embedded views in iframes that don't send a referrer. To fix them as-is, we explicitly provide the origin.
Using
strict-originoverstrict-origin-when-cross-originis the more private setting, avoiding sending unintended full-path referrers to the original origin.A future implementation might offer a config option to either offer a YouTube video as iframe, requiring to send referrers towards Google, or provide just a link (with thumbnail), which requires no referrer, iframe or JavaScript.
https://support.google.com/youtube/answer/171780#zippy=%2Cprovide-an-http-referrer-header-to-enable-video-playback https://developers.google.com/youtube/terms/required-minimum-functionality#embedded-player-api-client-identity