Nope. Emulators do not circumvent copy protection. When a ROM maker is extracting the game content from the original version, they are breaking copy protection. The ROM file they create and distribute does not have copy protection, so the emulator does not need to include copy protection circumvention.
> But, even moreso, removals of videos on youtube are typically not done through the DMCA directly, but rather through a private extra-judicial system youtube manages (content-id et al).
These are not, which is the point. Nintendo is doing this intentionally with their own DMCA takedowns. These aren't accidental false positives picked up by content id.