@Lhianna@feddit.de did not say which rights were at issue. Sleep is proven to be essential for survival. It’s also important to livelihoods. Sleep deprivation is also a common torture tactic as well as a driving impairment worse than intoxication. Perhaps no state’s constitution covers this but some of the relevant rights are enshrined in the Universal Declaration of Human Rights.
There are countless ways to implement autoplay. You apparently got lucky with one particular toolchain in one situation. Tor Browser is FF based and should not be extended by plugins (as that changes fingerprints), and TB plays whatever junk is on that page.
Have a look at how long Google has been unable to disable autoplay (2009).
The maker of Ungoogled Chromium made an autoplay blocker but it had so many failures he abandoned the project hoping Google would have the resources to tackle the problem.