Hi. I don't own Affinity Designer. However, I'm curious about it and I'd love to see a YouTube video showing Designer's vector brushes.
I've been looking for a drawing application with good vector brushes for quite a while. Since 2007, I've been using an application called Lineform because I love its implementation of vector brushes — which it calls artistic strokes. However, Lineform is no longer supported by the company which developed it and overall the application feels dated, so I'd love to replace it.