u/Mammoth-Extension462

I've seen a few videos on different platforms of engine noises you should never ignore, some of them I already know, serpentine belt, misfire, little stuff like that. But some others I'm a little confused what it could be when I hear them, to make matters worse some of the videos have differing sounds (which could come down to whatever motor the sound came from, I'm sure). But I want to get to know the different sounds so when I'm driving and I hear something I know something needs to be looked at.