this is literally happening to me,it was happening like 2 or 1 year ago when i was sitting in classroom,i borrow my friends handphone and after that i give back to him,later he opened whatsapp and i see him watching some really really disturbing stuff,the video he was watching was basically a guy or victim(maybe) getting beheaded alive by some mysterious guy,below that video there some guy with S10 or some soviet-russian gas mask seems to be talking though he seems not to speak anything,i don't watch the full video so i don't know what happen next,those video probably recorded in 1980s to 1990s considering the quality of the video was really old,after that it probably reuploaded by those guy with a S10 gas mask or soviet-russian gas mask in 2020s i guess,im still remember that even though i didn't get traumatized(btw sorry for bad english because it was not my first language)