How people shaved before metal working was invented VIDEO

Actually, archaeologists have found razors with other old viking artifacts. There could be more further back.

Did you just pull that number out of your ass? I think you did

It didn't become common practice until 1300s-1600s. Anywhere in that time frame should be good enough. Notice the words "common practice"? People shaved before then, but not as often as they did then.