Woman on YouTube private messaged me and asked if I could...?

She sounds like she could be a man.....or some kind of pervert depending on the type of video you made. She has no need to save it on her computer anyway...she can just go to YouTube. And yes I think she could somehow hack your computer by the raw file, because anything is possible these days, and there are some weird people! Be glad you didn't give her it, that was safe and smart.