"ffmpegthumbnailer could not be found" while it's installed and available

[Jose Riha]

Getting ffmpegthumbnailer could not be found in your path,\nplease install it to display video previews even when ffmpegthumbnailer is available.

# which ffmpegthumbnailer
/usr/bin/ffmpegthumbnailer

In the code there is a check for viu:

      if ! command -v viu &> /dev/null; then
        echo "ffmpegthumbnailer could not be found in your path,\nplease install it to display video previews"

which is a separate project. Once installed it's working without issues.