Re: not yours
Having a legitimate disk copy of a given movie would seem to be a pretty good license to freely download a working copy from the Internet, in the event that the rights holder somehow revoked the functionality of the physical disk.
You're not a lawyer, are you?
You can certainly argue that having a legit disc copy gives you the right to do whatever you like with that disc, within reason - including, for instance, putting it into any kind of disc reader of your choice. But to claim that it gives you the right to make another copy of whatever work happens to be on that disc - is pretty much the opposite of how copyright works.