People will watch your game plays if your funny enough, especially since you are one of the first people to have the Nintendo Switch. What most people don't understand is that more times than not people watch gameplay videos because:
1. The person playing the game is entertaining
2. See how to beat the game
The first is much more common than the latter. Honestly when it comes to channels that are about video games it has WAY more to do with your personality than what ideas you have.
I know that didn't help but since you are doing brand new games on a brand new console you don't have to have the most genius ideas.
freshvibes.