Disclaimer: This might not be legal in all countries. Check you local copyright laws.

Downloading videos and soundtracks from videosite can be accomplished with the program youtube-dl.

For highest video resolution, type this command from terminal or windows command prompt:

youtube-dl -f bestvideo+bestaudio [videolink]

Linux install:

debian based distro:

sudo apt-get install

Arch based distro:

sudo pacman -S youtube-dl

Windows install:

Youtube-dl is based on Python min. 2.6 or above. Python can be downloaded from you distros repo or from official site:
https://www.python.org/downloads/

After installing python download and install youtube-dl from:
http://rg3.github.io/youtube-dl/download.html