You can copy the files off to a PC using the FTP/SFTP server when enabled. Set-up is in settings.
If the programme was recorded in HD its encrypted and is locked to the box. Any programme can be converted to a mobile format, see page 30 of the manual AURA Manual, this downsizes HD, and other, content to a smaller file size but with lower quality. There are some settings which specify the size and frame rate for the conversions.
The files are TS Video which I use VLC Player to play.
Hope this helps.