Hook the Victim's Browser
The simplest way is to simply embed the code into your website and entice the user to click on it. This might be done by such text as "Click here for more information" or "Click here to see the video." Use your imagination.
The script looks something like below. Embed it into a webpage, and when someone clicks on it, you own their browser! ( You might also use the MitMf to send the code to the user, but this requires more skill.)
From here, I will be assuming you have "hooked" the victim's browser and are ready to own it.