Wondering about a Mac stream recorder?

[ptr91]

I'm not all too proficient with extracting from the source, to be honest. And I've yet to find a free program that works with Mac as I've not had extra money to spend on these things in a long time. But there is a video from pornhub I would like to download and I'm not sure how to go about that.

The URL is:

http://www.pornhub.com/view_video.php?viewkey=680195861

and I was wondering if someone could point me to a program that would allow me to download these videos or if someone could help convert/convert it to a download for me.

Help would really be appreciated as I have not yet found something compatible with my computer or easy enough to understand.