How do I install ffmpeg to windows_czkawka_gui_gtk_46 & are .gif files recognised by the program?

[Lowen-Beehold]

I followed the link given in the tutorial (https://ffmpeg.org/download.html#build-windows) and extracted the same folder that contains czkawka_gui.exe (version windows_czkawka_gui_gtk_46) but when i look for similar videos czkawka gives the message -

############### ERRORS(2) ###############
Cannot find proper installation of FFmpeg
Be sure that ffmpeg.exe and ffprobe.exe are available in PATH or are put directly to same folder where is app executable

Also when searching duplicate files czkawka doesn't seem to recognise duplicate gif files, even when I set the check method to size. Do I need to change something in the settings or are gif files not covered by this app?

Other than these 2 things this app is amazing. its going to save me so much time tidying up my data hoard. Thank you for creating it and making it free to use. It is greatly appreciated.