I checked for an official PKK YouTube channel. I found that they don’t have one as they’re a designated foreign terrorist organization* and Google complies with that designation by not allowing them an official presence. Unsure about the others but I doubt any of those companies would allow an official account. Probably individuals that belong to that group have accounts but I don’t know that for sure.
* I did not make the designation, I know nothing about the PKK, I am only referencing it.
Holder v. Humanitarian Law Project ruled that knowingly providing material support to designated terrorist organizations is not protected by the first amendment. https://supreme.justia.com/cases/federal/us/561/1
But I'm curious about your take on this. How would you argue the first amendment protects this?
So it's trivial that if you are the government and you want to arrest someone for speech, you first call them a terrorist organisation and then you can arrest them for speech? Ridiculous.