/^(https?:\/\/)?([a-zA-Z\d]+).bilibili.com\/?video\/av(\D{1,8})\/?$/

/^(http:\/\/)?(\w+)\.bilibili\.com\/?video\/av(\d{1,8})\/?$/

/^(https?:\/\/)?(\w+)\.bilibili\.com\/?\w*$/

/^(http:\/\/)?([a-zA-Z\d]+).bilibili.com\/?video\/av\w*\/+$/