Teknologic
Android Expert
If the dvd player cannot connect to Nexus, then can you connect the TV with the Nexus 7 then transfer the files?
Negative. If you can connect a N7 to a tv it'll be mainly for streaming purposes.
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If the dvd player cannot connect to Nexus, then can you connect the TV with the Nexus 7 then transfer the files?
You can use iSyncr or Doubletwist to sync your m4a files from itunes to nexus 7 for playback freely. For details, refer to a guide below:
http://www.androidauthority.com/sync-itunes-with-android-44248/
But for the downloaded digital copy, you also can sync them to your nexus 7 but you can't play them due to the DRM restriction. To get the digital copy work on nexus 7, you can refer to a guide below:
how to get DRM videos and Nexus 7 play nicely

Get the xbmc beta. It can play isos just like it is a DVD with menus and everything. Also works great on my sgs3
. It played individual songs fine.