Install tool: aria2c
wget http://sourceforge.net/projects/aria2/files/stable/aria2-1.16.1/aria2-1.16.1.tar.bz2
tar xvfj aria2*.bz2
cd aria2*
./configure
make
sudo make install
Download with aria2c
aria2c -j 10 http://anon.nasa-global.edgesuite.net/HD_downloads/HLV_Launch_anim.mov