I found and downloaded to my home directory, now I can't install it. When I try I get this:

root@0[etc]# apt-get install /home/knoppix/libdvdcss-1.2.5-1.src.rpm
Reading Package Lists... Done
Building Dependency Tree... Done
W: Couldn't stat source package list http://www.videolan.org i386/ Packages (/var/lib/apt/lists/www.videolan.org_pub_videolan_debian_i386_Packages ) - stat (2 No such file or directory)
W: You may want to run apt-get update to correct these problems
E: Couldn't find package

How do I fix this? Is this right apt-get lang to install this?