I actually have youtube channel of my own with about 170 subscribers, I've posted videos there for over 4 years now, and I know the structure of a youtube video, I can do the work fairly fast only downside would be uploading the video because of my internet speed, but i would not charge for that only for the work I've done on the video and how much it took me to do it. I'd say I could easily make it in around 2 hours, depends on what you want to have in the video.