Lump/Pimple on penis? (with pictures and video)

Hi, I'm 18 years old and not sexually active. I have noticed this lump on my penis for about a week now. What could this be? Should I be worried? Pictures:

Moderator comment:I have deleted the links to the images as they went to a site unsuitable for inclusion in the forums. Users can upload images directly to this site by using the icon at the top right of reply boxes.

Hello jack .... , can you upload a photo or 2 from a laptop or a PC directly to this forum?