A common issue I see with videos of poi spinning is that as the poi spin faster, the video ends up with disjointed arcs of light, rather than a smooth motion as one would see in real life. Here is a frame from a video demonstrating the issue:
Notice the hard edges showing the light collected in a single frame, which to me doesn't look good. In video, it produces this jarring effect:
I want the video instead to mimic human persistence of vision, wherein each frame is blurred into the next in a way that the spinning poi will draw a smooth path.
I do know that long exposure can be used in photography to mimic the effect, but I want the effect in video. My searching online for a solution hasn't been fruitful. How can I achieve this, either using camera settings or in post processing?