The document proposes a method for color harmonization of videos. It extends previous image harmonization work to address issues with rapid scene changes in videos like flickering artifacts. The method groups video frames and calculates a harmonization parameter θg for each group to smoothly transition colors between scenes. It also detects large scene changes as I-frames to allow independent harmonization of different scenes while reducing flickering between scenes. Evaluation on sample videos shows reduced flickering and visually harmonized output.