[_chu1]

Anyone else remember when movies on DVD or Blu-ray had those digital download codes in the case that were always expired by the time you bought it?

[mattl]

Ultraviolet they called it.

https://www.uphe.com/faq/digital-hd-with-ultraviolet-faqs

I was able to redeem several of these from used discs I bought for a few cents to a dollar each.