How to make The Best First Person Camera in Unity

I've been playing around with different camera configurations in Unity to achieve a non-jittery camera and I think I might've come across the best solution. Timestamps: 0:00 - Introduction 0:42 - Chapter 1: Understanding the problem 1:45 - Chapter 2: FixedUpdate vs Update 4:56 - Chapter 3: The solution 5:17 - Chapter 4: The solution part 2 6:18 - Chapter 4: The solution part 3 #unity -- Music used: Daystar - Lemon Cake A Hat in Time - Train Rush [Remix] by Qumu Cinematic - Aylex Fortune - Kyatto Lamp - Kyatto Once - RYU ITO MUSIC