Youtube is not playing nice with oEmbed discovery and is captcha/blocking some of my servers from getting oEmbed links. So, some instances were not presenting the video preview card for YouTube.
As a temporary solution I will be applying this fix https://github.com/tootsuite/mastodon/pull/12229
A restart of the services is required and a ~10 second downtime is to be expected in the next hour.
@max thanks :)
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