It did take a few hours to convert the movie clip. It is actually over 22 minutes long!
And it took some time to get used to the tools needed, like ffmpeg, audacity and imagemagick.
Especially the ‘mogrify’ feature of imagemagick takes quite a bit of time. But worth it!
But once you know the drill, it is basically fire and forget.
It would indeed work great for cut scenes in games