Ghost or horror stories/videos are appropriate during Pandemic moment? There are more and more horror movie during pandemic and tension moment. Hong Kong is one of the example before riots recently.
Pretty much of productions of horror or ghost movie produced because the audience just like to watch especially they are in horror state as when there is a demand, then it will have the supply.
Source - Protest in 2019 HK
Below are some reasons why some people enjoy and what happens when watching a scary movie from Psychology view:

Horror entertainment can trigger the fight-or-flight response, which comes with a boost in adrenaline, endorphins, and dopamine. The brain can then process surroundings and conclude that the experience is not a genuine threat.

Below are some causes and effects of watching a scary movie:

Excitation transfer: This theory states that people who experience an emotional response to horror also experience more enjoyment when threats are resolved.


Individual empathy: People who are less empathetic enjoy horror films more, according to Professor Ron Tamborini. He suggests that “viewers with high levels of empathy should dislike horror films because they react negatively to the suffering of others.”


Sensation-seeking: People who watch horror movies may want to stimulate sensory reactions. Studies indicate these viewers may be more aggressive than other people.

Source of Reference - Concordia University
Ques Ghost or horror stories/videos are appropriate from Buddhism view? As people like to watch now during pandemic to have temporary relief and feel good? Even some Buddhism stories itself talks about Ghost realms but it will give a bring back positive message.
Post note - one or 2 horror must watch in a decade should fine like train to Busan right? but not during pandemic and I know I am far from enlightenment too.
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...