The title here says it all. It’s a trailer for the upcoming Game of Thrones RPG and it introduces a city called Riverspring which is ruled over by a family called the Sarwycks.
Wait hang on, they’ve actually decided to introduce MORE characters to the Song of Ice and Fire? And a whole town that DOESN’T appear on any maps of Westeros so far. I would’ve thought that with hundreds of characters who aren’t main characters in the books to choose from and a whole world of detailed cities and towns, they wouldn’t need to create a whole new town and family House for it.