Transfering burned dvds to a computer

Have a look at the Handbrake app, as a starting point.

Then maybe at the VLC app, if you need a flexible media player.

You might be able to use Disk Utility to create disk image files from them.

Then Finder to burn additional copies, or DVD Player (which seems to have "gone missing" in Ventura) to play the disk image files from your computer as if they were DVDs.

I think I did this a long time ago with some home video DVDs, because it was much faster to copy them this way, than to open an iDVD project and wait for iDVD to transcode everything to MPEG-2, etc. for a new burn.

If you have an optical drive that you can mount the video DVD disc try making a disk image (.dmg) of it with Disk Utility and save to your hard drive. Then you an open the .dmg file and play it with DVD Player.

Otherwise rip the video from the disk as MrHoffman described (or both).

DVD Player is still around. It's been stuffed in a corner:

/System/Library/CoreServices/Applications/DVD Player.app