Long after the last DVD player has broken down, you'll still be able to play a vinyl record.
A physical representation of music that can be played with a paper cup and a needle is much more future proof than an encrypted digital disc that needs a combination of specific hardware and software to play. In 100 years, I doubt much of the population will have even heard of a DVD, and approximately 0% will have the equipment to play them. The effort required to build a functional record player is very small, a crappy one can be done in minutes with household objects, a decent one could be built from scratch in a day. Building a DVD player from scratch after the last one ceases to function and adapting it to whatever display technology they'll have available then would be a massive undertaking.
