This may be, strange as it may seem, part of what's driving this? There's a fan perception that Katie McGrath looked uncomfortable in that video and the juxtaposition of uncomfortable Katie McGrath vs. the rest of the cast who are clearly having fun is really bad because everyone knows that feeling of being forced to laugh along with people about something that bothers you. Double or triple that feeling for LGBTQ+ fans who sometimes have had to laugh along with something because it would be dangerous not to, and wow, that is like rubbing salt right into a gaping wound.