That's interesting, Cindy. I can certainly see both sides, though. Decades ago, there wasn't the sort of empire built around intellectual property that there is today. When Shelley wrote Frankenstein in 1818, there weren't action figures and TV shows and movie rights and theme park appearances and fast food tie-ins to worry about. If the author made money from sales of the book, that was great, and then they died.
Would companies like Disney and Universal be willing to spend millions developing things like Star Wars land and the Wizarding World of Harry Potter if they would only retain the rights to those IPs for a limited time? By the time Star Wars land opens, the franchise will be over 40 years old. If the old law was 56 years, they wouldn't have all that long left to profit from those original characters before every schlocky gift shop on 192 started selling knock off merchandise at a fraction of the price and any amusement park in the world could start opening Star Wars themed attractions and compete with Disney.
Of course, as the video points out, so much of what we associate with Disney didn't originate with Disney. From their early works, like Snow White, to recent hits like Frozen, the source material came from the public domain, stories written many, many years ago. If the estate of Hans Christian Andersen still owned the rights to The Snow Queen, we might never have gotten Anna and Elsa, Olaf and Sven.
I'm honestly not quite sure how I feel about that.
As for making exact replicas of existing products using a scanner and 3D printer, however, I definitely see a problem with that.