SummoningSalt is a documentarian and it seems entirely reasonable to show the footage unaltered. Especially considering the context and the how little was actually shown.
My problem is, six rapid f bombs in the span of 3 seconds as celebration of winning a speed run just does not warrant an adult rating.
Edit: I grant that it’s not for young children, but can you really say it’s on the same level as Adults Only content because of this? Is it so bad that only 18+ year olds can handle how profane this is? The video shouldn’t show up on YouTube Kids, but this doesn’t warrant making it as restrictive as adults only.