Is this an issue? You can set the gravity to any value you'd like in your game, it doesn't change the code's logic.
It is a continuity issue for people who are very new. When we see something that is different from video to video, we don't know why it is different, so we think we missed a step or we did something wrong as what we have does not match what is on screen. This is troubling for newbies. Continuity becomes a bigger issue for me in later chapters as well.
I don't learn that way myself, so it's good to know. It's actually not natural to do step-by-step tutorials for me, it's something I'm having to learn! 🙂
I agree, that shouldn't be an issue... don't just copy the code people, you suppose to understand it and be able to make changes to it and creat tour own ideas with ut