How to resolve a certificate issue

[seamusdemora]

Checklist

• I'm asking a question
• I've looked through the README and FAQ for similar questions
• I've searched the bugtracker for similar questions including closed ones

Question

REFERENCES: #25521, #25491, #25532, #25539

It's been said that, "I've already pointed out: yt-dl.org certificate is fine and not expired.". (#25539)

In that 'answer', a reference to support resolution of the issue is provided at this page

That page includes the following passage as a resolution (?) for the issue at hand (#25539):

What You Need to Do
For most use cases, including certificates serving modern client or server systems, no action is required, whether or not you have issued certificates cross-chained to the AddTrust root. ...

In summary then: @dstftw says the cert is fine/not expired, and the CA says I need do nothing. Yet I still get the expiration warning while following the documented download instructions.

Is an answer forthcoming - or further nonsense?

[comsomisha]

Let see #7309 (comment)
You should delete expired certs in your OS.