Which video format is for iPod Classics? I have a 6th generation iPod with 104 free GB out of 120, but it won't play .mp4 do they need to be on a
![iPod classic ("Original"/6th Gen) 80 GB, 160 GB Specs (iPod classic, A1238, MB029LL/A*, 2173): Everyi.com iPod classic ("Original"/6th Gen) 80 GB, 160 GB Specs (iPod classic, A1238, MB029LL/A*, 2173): Everyi.com](https://everymac.com/images/ipod_pictures/apple-ipod-6g.jpg)
iPod classic ("Original"/6th Gen) 80 GB, 160 GB Specs (iPod classic, A1238, MB029LL/A*, 2173): Everyi.com
![Amazon.com: Apple 30 GB iPod AAC/MP3 Video Player, 5 Generation (Black) (Discontinued by Manufacturer) : Electronics Amazon.com: Apple 30 GB iPod AAC/MP3 Video Player, 5 Generation (Black) (Discontinued by Manufacturer) : Electronics](https://m.media-amazon.com/images/I/710VW8KqRTS._AC_UF894,1000_QL80_.jpg)