Did you live in a region that broadcasted analog TV in the SECAM colour standard?
I made a program that can add the SECAM flare effect to digital images. I attached two pictures showing the results.
The program can also be used with video when combined with ffmpeg using unix shell pipes. ffmpeg must deliver/receive raw RGB or YUV888 video data for that.
The source code is licensed under the GPLv3 license and can be found at Codeberg: