fix plugin path

I have a plugin that has not been written correctly.
It calls the path:
echo bloginfo('template_url');
echo "/wtf/player/swfobject.js'>


This is calling a path (actually it calls styles, js and a htm5 player) to the wtf folder in the theme path instead of the plugin path.

I have tried enqueueing the scripts but they are not working.
I have tried changing paths to plugins_url etc which is on the wordpress codex page, but I am obviously not doing it correctly.

So my first step is to figure out how to change the above path to the plugins directory instead of the theme directory.

How can I do this?