How to make simply “report” button on posts

I’m building up a video-site using wordpress. It embeds videos from different sites. I really need a simply “Report broken video”-button that saves the url in a database or emails it to me. I’ve searched through some plugins, but can’t find any that does the job. Do you guys know any simple and easy solution to this?

Transform php code into a widget?

how can I create a widget out of a php code? It’s just a disqus code that I would like to place in the sidebar. I could just paste the code in the widget section (my tag), but then I would not be able to change it’s order with the other wigets. This is why I want to convert this code into a widget.