URLs are funny things... they oftentimes have a lot of gobblygook in them that Camtasia Studio, Screencast.com, and other application or web servers just don't like.
For example, look at the "body" of a typical URL copied from a web browser (I removed the beginning so it wouldn't show up as a link in this post):
Attempting to use this URL in Camtasia Studio, or an email, Word document, etc. is a disaster waiting to happen. TechSmith products and many other applications out there don't like the way this URL is formatted and don't like the use of the special characters like &, ?, =, etc. Also, URLs like this can be seen as a security risk so operating systems or browsers block them.
So.. to make this URL usable, there is www.tinyurl.com. You just go to this page, paste your original URL into the provided field, click the button, and out comes a clean and usable URL.
Tinyurl.com took the example URL (176 funky characters) and turned it into this very short and usable URL (26 characters):
So.. whenever you want to use a Jump to URL hotspot in a Camtasia Studio video, pass it through the tinyURL blender and use that one instead.