The BCC Rays Radiant Edges filter creates light from the edges of the image. I created a silhouette of the hand by applying the Linear Light mode to the keyed footage. The ball was created with BCC Sphere and then the Rays Radiant Edges filter was applied to both the hand and the ball.

The twirl on the back drop was made by the BCC Twirl filter. It has a motion tracker which should animate the motion by following the movement of the arm but I used the "twirl center" parameter on the filter and manually generated key frames to follow the movement of the hand for a tidier motion. The motion tracker generated scads of key frames - far more than were needed. The BCC Glow Alpha Edges filter added a soft white glow to the masked arm that improved it’s compatibility with the back drop behind it.

I used this filter to apply a glow with a gradient attached to it to the alpha channel from the keyed hand. As with all Boris Filters - this filter could be used in many ways. For instance, the gradient colors, the thickness or brightness of the glow and many other parameters could all be animated over time. In this clip I chose to have the outline of the hand movement from the original video to be the only changing parameter.