The link to download the ffmpeg package leads to nothing
Solution: The link referred to the compilations of the programmer Zeranoe. Unfortunately, he ended his service in september 2020 [info here]. A big thank you to Zeranoe for his years of great work so far! We at Atlas Informatik have always appreciated it very much. Thank you, thank you.
Now you can download the ffmpeg package from SourceForge.
The one for 64-bit Windows is called something like "ffmpeg-N4.4-101785-gdc91b913b6-win64-static", the one for 32-bit has "-win32-" in its name. It's also fully compatible with Multimedia Xpert. The freeware tool 7-Zip is needed to unpack it.