Sorry for all the questions lately, just getting back into the game and couldn't find anything in the FAQ.

Banna Bearers reads:

Action: When a Hero or legend you control is declared as an attacker, pay 2 resources to put this unit into play in your battlefield, declared as an attacker.

I have 2 questions regarding this card.

(1.) Does this get played from your hand? I would assume so since it says to "put this unit into play", but since it's an action I don't see how the text could be considered active. Or maybe I missed something in the FAQ or rulebook…

(2.) If the answer to (1.) is yes: Is loyalty considered when putting it into play? For instance in a DE deck or Choas deck, does it go in to play for just he 2 resource expense stated on the card?

It should be a constant effect, not an action, because you indeed can't trigger an action on a card in your hand. The card will probably receive an errata in the next FAQ.

You don't have to consider loyalty when putting it into play.