Throw a clip out of focus and let every bright light bloom into the shape of a lens aperture. Street lights, fairy lights, reflections on water, and car headlights at night turn into overlapping discs, as when a camera’s focus is pulled far off the subject.
Discs and threshold
Highlight Threshold decides what counts as a light. High values keep discs for real light sources; lower values let bright skin and clouds form discs too, which gets busy quickly. Disc Brightness scales how strongly the discs are drawn over the defocused frame.
Background defocus
Background Defocus blurs the whole frame. At 0 the picture stays sharp and discs are added over it; at high values the scene dissolves and only the discs carry shape. For an opening shot or a title background, push both disc size and defocus high.
Night footage
Bokeh needs small bright sources against darker surroundings. Night city footage, candles, and Christmas lights work well. Daylight footage with bright sky produces large overlapping discs that wash the frame out; raise the threshold toward 240 for those clips.