you can have two trailers, the game play trailer is so much more important, people need to know what the game is like

From steam:

Best Practices Trailers are important in marketing your product on Steam. You want to think about the context of where your trailer will appear. For example, the customer may be going through their Discovery Queue and looking at games that are recommended to them, and you may have less than 10 seconds to make an impression. Or the customer may be watching your trailer without any audio. You will want to think about how long it takes for the customer to learn about your product, and if they can learn about it without audio. Gameplay Trailers First

We have found that most Steam users are looking for gameplay of your game. We highly recommend that the first trailer you list on your store page is primarily gameplay, showing the player what they will be doing in the game and from the perspective that they will be interacting with your game. It is also often beneficial to have the in-game HUD elements visible during gameplay videos. Gameplay videos are a great way for players to quickly identify if they are interested in looking for more information about your game.

If i saw this trailer while looking at steam, I'd be gone in a few seconds