Mopidy-Youtube installation error on Linux Mint

Hi guys! Thank you so much for this job, I really like it!

I am running Linux Mint Cinnamon 18.2 and I tried to install mopidy-youtube without success. This is what I got:

Reading package lists... Done
Building dependency tree       
Reading state information... Done
Some packages could not be installed. This may mean that you have
requested an impossible situation or if you are using the unstable
distribution that some required packages have not yet been created
or been moved out of Incoming.
The following information may help to resolve the situation:

The following packages have unmet dependencies:
 mopidy-youtube : Depends: python-pafy but it is not installable
E: Unable to correct problems, you have held broken packages.

If I run apt-cache show python-pafy I get:
N: Can’t select versions from package ‘python-pafy’ as it is purely virtual
N: No packages found

And with sudo apt-get install python-pafy I get:

Reading package lists... Done
Building dependency tree       
Reading state information... Done
Package python-pafy is not available, but is referred to by another package.
This may mean that the package is missing, has been obsoleted, or
is only available from another source
However the following packages replace it:
  python3-pafy

E: Package 'python-pafy' has no installation candidate

I don’t know how to proceed since I don’t want to break thing. Should I just try with python3-pafy? I have python 2.7.12.

Thank you very much for you help.
Matteo