This Brassfetcher video was the one I was referring to. I had thought you meant the same. Here, you can clearly see in the font as you play the video that he used 20% gelatin. Must have been either 2 different tests, or a misprint.
You can also see Brassfetcher's own comments below it:
The dynamic penetration depth was 8.8". This is 20% gelatin, which is much tougher than 10% gelatin. We don't look any deeper than 8" penetration for the majority of analysis.