[thetoon]

What is it always?

[ayhanfuat]

They are referring to the "blacks cannot swim" stereotype. Black kids are more likely to drown in pools and in these videos they appear more as well (see https://www.abc10.com/article/news/community/race-and-cultur...).

[gexla]

I feel it's more culture than race. Seems income is a big factor. Most likely to affect marginalized communities. I see it a lot in the Philippines also. Maybe it's less access to swimming lessons and pools to practice in.

[soneil]

It does seem to somewhat skew the aim of the site. Account for all the black kids riding rings, account for those near depth, and then watch to see which changes. I got bored before I found any variation on the theme.

I did find a couple where you could tell which kid was going to be in trouble long before it'd let you click them, which I found interesting.