It's not really just the material - the design will play a big role in how long they last. Some companies don't make great carbon forks and they break faster, other companies (like Clean and Crewkerz) do and their carbon forks will last a long, long time.
If there's no signs of them breaking then you're probably fine to keep riding them. Carthy used to break alloy forks pretty regularly but the Crewkerz Carbons last him a long time, so if he's got that similar increase in durability from switching to them you should too. The Clean forks are extremely similar to the Crewkerz ones, so they should be fairly representative.
Still reading the comments, but really didn't want to miss the opportunity to express how truly awful every attempt he makes at marketing is.
That takes the win for me, just quit this ridiculous you tube game. do demos like every other trials rider trying to make a living.