how to convert ipod movie back to regular size

[bikejumpr2020]

I downloaded a movie and then i converted it to the small size so i could put it on my ipod.. well i deleted it off my computer cause i already had it on a disc. anyways i went to copy the disc and it said disc cannot be read, so instead of having to downlaod it again is there a way i can take it off my ipod and convert it back to normal size without losing the good quality??

[Skillian]

You can convert it back it up but the quality is gone forever.

You might as well just play the ipod file on your computer.