In other words, there's a catch-22 in how strict we are about the definition of effective protection. 99% of the public won't even open their browser tools so I guess if youtube-dl is put behind some very generously documented JavaScript that is easily bypassed then it is not actually out in public because it is effectively DRM protected, right?
There's really is no way around this. YouTube videos are protected by technological copyright restrictions. ANY attempt to get around those restrictions is a crime.
Even if this were not the case, you would be committing copyright infringement by downloading the videos for unauthorized use anyway. The DMCA just gives legal teeth to technological attempts to prevent casual infringement.
This is incorrect. The website implements the protection mechanism, browsers execute it, just as youtube-dl. The implementor is the person writing the code, not the system executing it.
> Certain YouTube videos are licensed only for streaming playback by the YouTube site or app.
The meaning of this sentence is unclear. What does it mean for playback to only be allowed by the (web)site? Websites alone cannot do anything -- they require a web agent which fetches and executes them. Firefox, Chrome, Safari and youtube-dl are examples of such agents.
> Even if this were not the case, you would be committing copyright infringement by downloading the videos for unauthorized use anyway.
Luckily for me, I am in a jurisdiction where this is not the case and where DMCA plays no role.