You can interpret it as “It was easy in the XVIII century, so it is totally trivial nowadays”

I never said that

Listen, this thing was effective right from the start. Do you really think it is so “technically challenging” if people from the XVIII century made it work from the first go? Any non-imbecile engineer would make needed calculations in no time.

Interesting link, actually. Thanks.

Don’t know nuances but DRM for videos is already a thing as far as I know. It is just coded and to decipher it you need some black-box library. A similar thing works for satellite TV.

Depends on where you live. Choose the most widespread variant in your country.