YouTube has a lot of junk, but there are also a lot of useful videos that demonstrate various practical skills or the experiences of using certain products, or recordings of certain natural environments, which are original, in the sense that before YouTube you could not find equivalent content anywhere, except by knowing personally people who could show you such things, but there would have been very small chances to find one near you, while through YouTube you can find one who happens to live on the opposite side of the World and who can share with you the experience in which you are interested.

This is basically my only use for YouTube. “How do I frame my carport” and such where visuals are crucial to understanding. But commentary or plain narrative? It’s painful.

It's difficult for an AI to tell what information from YouTube is correct and reliable and which is pseudoscience, misinformation, or outright lies.

In that context, I think excluding YouTube as a source makes sense; not because YT has no useful content, but because it has no way of determining useful content.