come on don't be a wanker someone point me in the right direction

hey guys i am sure this has been asked over and over.
I am after a specific sound http://www.youtube.com/watch?v=UgV2OXldFiA
its the root note of that track.. i hear it everywhere. Im wondering if anyone knows where i can find similar samples or if someone can explain how its made. It sounds like a ...

and whats infinitum?

i usually just cut a sampled 808 bass for my sub but i wanna learn different methods of acheiving a punchie kick sub bass combo thats more versitile
cheers . would be great for if you could give abit more info. iv only been producing for 3 mnths now. i dont know how to make a good bass and play it ...

http://www.youtube.com/watch?v=-D1X9yjb6jY

i was just intrested if someone chould explain how to make a bassline/kick variation similar to this. it so simple yet so effective. would appreciate some feed back thank you