Not on an Ipod..  Other players support more formats vs the Ipod.  For an Ipod, U R Bound to their specific format for Videos and music..
As for downloading directly from TV, U will need to contact Comcast.  The way which I download and transfer is via a Labtop...  Download what ever movie you want via Window Media Player then converted to a file that your Player will understand...   You should not have a problem recording TV shows using a PC..  Simply bring the cable into your supported video card on your PC.. download there then transfer to your Portable player.  Good luck.. contact your cable provider if you have issues...  
