$ snap interfaces
Slot                 Plug
:firewall-control    -
:home                -
:locale-control      -
:log-observe         -
:mount-observe       -
:network             youtube-dl
:network-bind        youtube-dl
:network-control     -
:network-observe     -
:opengl              ubuntu-calculator-app,ubuntu-clock-app
:snapd-control       -
:system-observe      -
:timeserver-control  -
:timezone-control    -
:unity7              cap-test,ubuntu-calculator-app,ubuntu-clock-app
:x11                 -
-                    youtube-dl:home