title: What is the best way for me to create a unique query string for the purposes of what I'm doing? (Generating video file)
body: <p>For my site, the user uploads 2 files, the site redirects, and I generate a video file that the user can play. What should the URL for the site that's being redirected to look like, and what method would you recommend I use to generate a unique URL? </p>
  
  <p>This has something to do with encoding and decoding I believe, but I'm not sure what as I haven't really delved into this.</p>