It's no doubt disturbing and creepy but there's something frustrating about it.
Makes me wonder, like you said, if there is some kind of code they're using. Does "the mask" signal something or mean something specifically. Does slow motion mean something specific.
Why would they communicate through youtube? Why not on cell phones?
These videos almost have the feel of being created by algorithm. It's lacking in some coherence.
Anyhow, don't forget to take a break from this stuff now and then. Jesus.