I say don't stick 100% to a script, but having your points writing down can easily keep you on track on what you're trying to tell.don’t use scripts. don’t. if you are, don’t. if you look at my older commentary videos, you’ll see that i had a very robotic sounding voice because i read a script and made it sound one-toned if you get what i mean. you can use simple billet points instead and while recording, improvise.
also, realize that your voice doesn’t matter!!! who cares if you’re a squeaker or your voice sounds weird or something? once i realized that i got more confident in my voice and myself. dunno if that helps too lol.
take this advice from one youtuber to another