Feeling really anxious right now. Please help

My two cousins watched a YouTube video last night with one of their favorite Youtubers, who react to spook scary videos with his fans who send him scary links to his twitter account and he reacts to them, they love to watch his reactions when he watches scary videos. The one video they watched definitely freaked me out, as my cousins watched a supposed cursed video last night and I’m really worried now if they might be in danger or my house is. I don’t really watch horror stuff as much, that has ghosts or demons in it, since they easily give me anxiety. But I’m really hoping the video on YouTube they watched was fake. I have been definitely paranoid, since I suffer from bad anxiety. Are they really cursed?