[trelane]

> The only difference between those files and, say, a DVD, is that the encoding is more space-efficient.

Also that it's (depending on the format) perhaps not illegal to use the content in the file wit any viewer you choose.

[1718627440]

Which does not depend on the data being on a DVD at all, but the details of contract of purchase. When you buy the data on a harddisk, the exact same terms would apply.