weird never got posted … sorry about that …
I saw this and thoght it could help (just a random example from the F1 Youtube feed)
curl --silent “https://www.youtube.com/feeds/videos.xml?channel_id=UCB_qr75-ydFVKSF9Dmo6izg” | grep “link rel”
shows for example:
<link rel="alternate" href="https://www.youtube.com/watch?v=dj62UQR7y7M"/>
<link rel="alternate" href="https://www.youtube.com/shorts/cdVoZklIk8o"/>