If you are needing to open the file in a PPC G4 or other old G3/G4/G5 non-intel Mac
then the application of the era was likely Roxio Toast (perhaps version 10.0.2?) for
use in PowerPC hardware run under OS X 10.5.8 Leopard or OS X 10.4.11 Tiger.
A light history of that product series can be found here; not so much.
https://en.wikipedia.org/wiki/Roxio_Toast
• https://www.google.com/search?q=how+to+open+Roxio+Toast+files+using+other+utilities
https://www.google.com/search?q=how+to+open+old+Roxio+Toast+files+made+on+Mac+PPC
There may have been a combination of other applications that could take a whack at it;
but now there's a greater divide between what was, and what's now available. Plus
changes in Roxio. ~ I had composed a better reply than this, but the Site chose to not
automatically save it; then I could not re-post it either -- so that content with links is lost.
This happens in ASC discussions, especially when attempting to post links elsewhere.
You may be able to get the ISO file and make use of that, perhaps even in Disk Utility, as
that used to offer a tool to burn content to disc media. See results of first google search
Doubt if an extractor utility such as Pacifist (charlessoft) can do that; it works with system
archives and applications installers that are orphaned or broken. The other utilities to for
use with video when created by such a program tended to be limited to use their files.
Some results pointed back to generally how-to articles, or excerpts missing good detail.
Creative search may find a few clues; proprietary software code where it exists, limits access.
Not sure what else to say. I've not a copy of my previous reply; so a bit of time is lost.
Had this site 'automatic' save done so, I'd not have wasted time, yet again. __it happens.
I've still got older Macs and likely have Roxio Toast on disc media; didn't use it all that much.
Sorry to not be of much help. This has been a waste of my effort & your time.
Good luck in any event! 😉