The Adventures of Me
You would need to take a look at the Pod logs so see which step it is hanging on.
The tutorial was only dealing with video so it just mapped the video to the output. To also include the audio, you would need to also map it from the input.
ffmpeg -i source.mp4 ... -map "[blurout]" -map "0:a" blurout.mp4
Yes, there are a couple of options
docker run -v myscript.py:/myscript.py alpine echo \"* * * * * python /myscript.py\" | ...