Ghost or horror stories/videos are appropriate during Pandemic moment?
Ghost and horror stories are thrill-seeking venues, not much different from a roller-coaster or bungie-jump. The egoic mind seeks them out because it suffers from an existential fear of extinction. The story creates a fantasy in which the hero confronts a murderous supernatural force and then escapes or overcomes it (for the moment), even while that force decimates the ignorant, the disbelievers, and the morally weak.
In a way — and with full appreciation of the irony — horror stories are how the egoic mind (mis)interprets the concept of enlightenment: karma is imagined as the murderous supernatural force pursuing those without virtue; the characters battle their way towards liberation, or fall through their own foolishness. Even the cyclic nature of the world is captured in the sense that the murderous force never truly dies, but reconstitutes itself again and again in the sequels.
I'm not going to dictate whether watching a horror story is good or bad, any more that I'd dictate that eating pizza is good or bad. They are indulgences, and in moderation indulgences are not necessarily harmful. So long as one is aware of the risk of reinforcing that fundamental egoic (mis)understanding of the world...