It would seem I put the wrong link - the link is https://www.youtube.com/watch?v=Filv4pP-1nw however I would still stick to my point and get the URL you are happy to rank for and then sort out the content on the page. While the URL may only be a small factor in google algorithm.
But if your unhappy with your url structure now, no matter what happens Ive found that in a year or so you will wish you had changed the url.
So I always recommend changing the url to something you are happy with, then work on content, link building and improving the page, but I would still argue that the little bit of page rank lost (and without knowing the page its going to be hard to know exactly the implications), its worth it to get the URL structure you are happy with and then work on the content.
What I wouldn't recommend is 301 a page, to another page which then 301 to another page - this is seen as bad and you will lose a lot of link power, google may follow 2 or 3 stacked 301s but after that they wont http://www.jamesburton.net/chained-301-redirects-google-search-impact/. So doing a 301 wont hurt your ranking if you have decent content and links built in, just don't start stacking 301s