Welcome Henric,
Baseball is a great game, and the OOTP community is one of the best on the web.
I have seen Aussie V; fun stuff. He puts a lot of work into those videos.
If you are new to baseball, I would recommend that you pick-up a book called:
"Baseball Field Guide: An In-Depth Illustrated Guide to the Complete Rules of Baseball" It's like $10.00 USD on Amazon, and has some good illustrations and explanations.
https://www.amazon.com/Baseball-Fiel...2643793&sr=8-1
Also on YouTube, check out Foolish Baseball's channel. He has a really good video instructional series for OOTP 19 which still is applicable, where he covers a lot of the real world stats and concepts, along with the game of course. He also has something called "baseball bits", which are cool short videos on a range of certain baseball subjects.
https://www.youtube.com/channel/UCbW...U33A/playlists
Finally, as to other OOTP YouTube play-throughs, I liked Archer Gamer's Arizona series he did for OOTP 20 last year.
https://www.youtube.com/watch?v=QOu1V9ZPc-Y
Anyway, welcome again and as you get into the game, feel free to ask questions.
-Cal