Is it possible to set the stepsize for the rewind keys in YouTube not to 5 seconds but to 1, for more convenient listening of the English language?

Question

YouTube

Sobsna, the whole point got into the subject.
I am learning to understand English speech, and YouTube is an ideal option, as it seems to me. But one moment is annoying: when you don’t hear one word and you don’t want to cheat, but hear it yourself, after listening to it many times, you either have to aim the mouse at the desired timecode, or rewind for 5 seconds and listen to a bunch of extra words.
I put the Javascript tag on it, most likely the solution is feasible. Google didn't help