Tournament strategy books/articles or videos?

How do you revise and learn more about the game whilst not playing, I see there are lots of books available but mainly for cash games? I'd love to see some specific books/articles for specific types of mtts.

card runners and drag the bar have lots of tourney strategy videos, or there are lots of free strategy vids on the twitch

Moe, check out on YouTube channel "The Poker Bank". Most of their videos is for MTT but have LOT OF hand reviews from cash games. You will like it

or there are lots of free strategy vids on the twitch

specifically for tournaments I would prefer after all books

Both, my friend. When I was starter, books and players notes from Internet were very very helpful and useful for me. I take other players experience from it and put it into my personal games.
Then was Videos with poker hands contemplates. I watched it and learn more.