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Only if you disable JavaScript it's white text on white background.

It's current trend to write CSS styles in JavaScript.

On Desktop I see black text on white background, although the videos don't seem to load.

Reading mode to the rescue!

It's like #222 on #FFF ... not bad contrast?

Not sure why, but on my phone it's barely readable.

Night mode or dark theme related maybe?

Some sites don't set a body background color thinking it will always be white.

Might be related.

The font could be made bold..

Extra thin font violates accessibility standards.

Firefox reader view saves me on a regular basis.