Is it possible to edit URLS in a .warc/wacz file?

In my example: Gofile - Free Unlimited File Sharing and Storage I have a specific use case where I want to replace the skin URL,, with something else such as

Is it possible to edit just one line in a .warc file? If so, how would I do so? My goal is to make is so I can playback the replays with a different skin. Is changing the URL not enough? Do I also need to replace the image in the .warc file? Not really sure how this all works.