I personally don't think re-burning the disk will help, but you can try. The medium of the disc matters too (e.g. DVD+R will perform worst than a DVD-R)
I'm not sure of your system -- which G4 system? (What's MDD?
) Are you trying to install 16.10 or 16.04? How much RAM does it have?
Not enough RAM can be another possibly to freeze, but graphics are also be a culprit for PowerPC.
On an old iBook G4 I haven't touched in ages, 12.04 and 14.04 were the "best" versions that worked well with the iBook G4, but there is no Ubuntu MATE versions available. Depending on the Mac you have, USB booting may be hit or miss. I couldn't get it to boot from USB, and that's the "NewWorld" Mac firmware.
I don't really know much more about PowerPC. Somebody else will know a solution. 