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.