Hello! I popped a few tips/resources/best practices for promotion into a thread a little while back. You might find something helpful here -- https://itch.io/t/646271/promoting-your-game-with-zero-budget-the-big-indiedev-marketing-guide
If getting YT views through influencers is your focus, it's all about relationship management; finding the right people for your genre/target audience, and then getting as many codes into the right people's hands as possible. That's not a quick/easy thing; will take some hustle. Of course you can opt in to itch.io's partner program which automatically grants certain media/YT'ers access to your game.
Good luck!