Is there any such thing? I need an overview on how to play what to do (disable key monster, etc,) against meta deck
Where can I watch replays. I don't find anything related to this game if I search for "Duel Links" on xvideos
It's much easier if you just watch some replays of duels such that you'll get a brief overview for those decks. After that, just keep playing PvP. You'll face many meta decks and you'll learn how to counter them.
But GameA and Duel Links Meta have usually some sites for each meta deck. So you can also read through those sites and see how the decks are supposed to work on paper.