[throwaway314155]

Setting the allowed url to "youtube.com" results in tool usage failing (up to max_calls times).

Does this mean there are certain sites that the search tool simply can't access?

[alberduris]

Yes, it seems so. I’ve tried every possible way to get it to specifically search for YouTube videos and there’s just no way.

Even if you search for videos on a topic with hundreds of highly relevant YouTube videos, and explicitly ask it to find YouTube videos, it still says it found other relevant stuff, but not YouTube videos.