Todd said anything not in the games is not canon. Ignore Todd.
I agree with that, because the games are the only true canon, same with everything in them. I'm not saying that the only truth about lore is in the game, what I mean is that the game is the only thing that is absolutely certain, we know there is a book series titled "The Real Barenziah" that contains the text that we can read in the game, that's the only true canon in my opinion, any INFORMATION from that series is NOT canon, as some in-world person has written it, and noonke knows how or why, the only way it could be canon would be you to experience it in the game. I think that there is no true canon in TES beside what's in the games, we KNOW that the nerevarine defeated dagoth ur, if a book in the game told you about it, the only canon in that book would be the letter assortment. Obscure texts are special, most of them take form as in-world accounts and stories, and because they are not in the game, they are not canon.
Canon is word of god statements, anything related to TES is NOT word of god, so the only true things in TES are what we have seen in the games, like that vvardenfell is an island, and that the champion of cyrodiil saved kvatch.
I take an obscure text as an example(Vivec's Sword-Meeting with Cyrus the Restless)
As an obscure text, it does exist in some form, MK says it has happened and tells about it, so it does exist, and is a lore referencee, but not canon in any way.
If it was in a game, we would know that that story really does exist, maybe who wrote it/told it, and what the story is, that's the canon, because it's in a game, we KNOW it exists.
It would only be true canon if you experienced it in a game.
What I mean is that Todd talks about canon, not lore, the only flawlessly proven things are those that are in the games, not stories or truths, but the existence of them, something outside of TES that is official is lore, but it's not canon in anyway because it isn't proven it even exists.