How is this possible?

[TheBeardedDude]

If light is the fastest speed possible, ...

Hint: it is not

I saw a great tik-tok explaining this but I doubt I will find it again. 

Light is the fastest speed possible, but there is a sort of catch.

The universe is expanding at an accelerating rate, which means that it is inevitable that it will begin to expand faster than the speed of light (except it technically can't). The universe is expanding, but it is the expansion of space (the medium through which light moves). Whereas light is something that moves through a medium (space). We measure speed as a distance per unit of time, but the expansion of the universe is the creation of the distance (in a sense). So measuring the rate of expansion of the universe can't really be recorded as a distance per unit of time and isn't actually a speed. So, light is still the fastest thing in space/time