By default, YT adds a thin red line to the bottom of videos you've already watched, but the red line is small and often blurs in with the video's thumbnail. This script solves that problem by adding a highly-visible green rectangle around videos you've already played. Simple & works well.
Better than YT's default red line indicator
By default, YT adds a thin red line to the bottom of videos you've already watched, but the red line is small and often blurs in with the video's thumbnail. This script solves that problem by adding a highly-visible green rectangle around videos you've already played. Simple & works well.