No, don’t worry it’s not a sequel. Someone just took the original film and edited together to be a modern day medieval style action movie trailer, replete with cliche Inception musical BWWWWWAAASSS. It’s actually pretty well done if you can ignore the horrid font choice, which you should be able to.
Usually these things seem really forced, but this one works by cherry picking really small parts that could actually be dramatic and playing them out perfectly over the score. If you didn’t know any better you’d probably guess this was a low budget King Arthur drama. That’s pretty impressive reworking.