One of the biggest issues with the Digital Millennium Copyright Act is that it was never designed for a world where Siivagunner[1] exists. On a fundamental level, it was built on the assumption that everyone involved can litigate--which means that the widespread ability to edit, remix, and review things has created some unfortunate exploits and exposed serious oversights in how the DMCA functions.

[1]https://youtu.be/rEcOzjg7vBU