you cant link to videos directly, coz they are protected by token system, which is valid for few hours for specific ip or location,
what you can do is use their iframe player embed code to include that video with video player in your blog.
e.g. you click Embed button which gives you iframe code something like this.
Code:
<iframe width="560" height="315" src="http://spankbang.com/cn98/embed/" frameborder="0" scrolling="no" allowfullscreen></iframe>
you add that code in your blog and voila.