"In many post-conversion Western traditions, ravens have long been considered to be birds of ill omen, in part because of the negative symbolism of their all-black plumage and eating of carrion. "
"As a carrion bird, ravens became associated with the dead and with lost souls. In Sweden they are known as the ghosts of murdered persons, and in Germany as the souls of the damned."
A carrion bird eats from the caracasses of dead animals like vultures - in a similar way circling vultures are an omen of death the Raven also symbolises this. Obviously a Raven is a more suitable metaphor than a vulture taking the setting of the poem into consideration.
I like the idea of using a slightly more metaphorical element in admidst the human characters - as ravens are seen as omens of death then the link to the events in this poem are clear that death is imminent. I want the Raven to appear at various points during the video