Html Agility Pack - Knowledge Base (KB)

How do I get direct URL of the .mp4 video using C#?

I need some sort of algorythm that would extract the link from mp4engine. ...Here is the example of a page I want to scrap....Desired output in this case would be: ...http://mp4engine.com:182/d/a2chmyndcqqgkpskitclvbgu5pgwxve2vmlrdsctpwbte2flb4i4hrz6/.hac...