Download videos from Senate website

I've tried using a lot of software (VLC, Real Player Downloader, and some others that I've now forgotten the names of) to acquire one video that is located here: http://www.foreign.senate.gov/hearin...rd-north-korea

Unfortunately, none have worked. Does anyone know of an open source program that can find the the video url and download it? I don't understand why the Senate (or House) make public domain videos more easily downloadable, but until they do, I would greatly appreciate it if someone could point me in the right direction.

I'm using a mid-2012 Macbook Pro.

Thanks!