Miro (previously known as Democracy Player and DTV) is an Internet television application developed by the Participatory Culture Foundation. It is supported on Microsoft Windows, Mac OS X, and Linux.
Opem Synaptic package manager from Open System -> Administration -> Synaptic Package Manager. You will be asked for your user password upon opening Synaptic.
Once Synaptic opens go to the Settings -> Repositories menu, then click on the Third-Party Software tab in the window that pops up. Click the Add button and copy/paste the one of the following line then click the Add Source button