Since this is a help request, please use the appropriate place which
is the forum.
dev1galaxy.org

After editing your /etc/apt/sources.list file you should run:
# apt-get update

After that try to see whether version 1.1.1 is available. You can use:
apt-cache search libvdpau1

Then, install the package:
# apt-get install libvdpau1

Before allowing the installation check which packages are to be
replaced to make sure you don't break your system.

--
If you can't explain it simply, you don't understand it well enough.
(Albert Einstein)
If you cannot make abstructions about details you do not understand
the concepts underlying them.