Can anyone tell me what program is used to make this website and video? Also,how hard is it to make something like that?

 

Macromedia Flash + Adobe After Effects + Adobe Photoshop + Adobe Illustrator a video editing programme.

Something like that will take time, lots of time and is not something you could knock up without skill + creativity. I would expect it probably took at least a month of animation if not more, then there's the lip-syncing...

Saying that though getting into motion graphics is a good thing. You can produce some really impressive things with just even a small amount of knowledge. If you get used to the programmes above then you will be on the way.