I can explain, @caspermoeller89 was asking too 😉 So if you have a look the top 3 stakers already have banners, they are essentially ad space for them, anyone that comes to an update or guest post sees them and may follow them upvote their post, or maybe it will help solidify their names on the chain, this is not something super useful for most users but one must keep in mind that we have many project on hive and for them this ad space is extra attractive. And now with the new banners they get something really cool it's not just a picture but a video that looks like a movie studio opener, has sound and can feature almost anything they like, they are free to use this 1080 version with sounds as they please outside of us using it in the DUO posts the post will feature a gif version , here is an example I use in my blog