Trading is very very complex, if not carefully followed with caution it may lead to An uncontrollable addiction that sometimes have consequences like that of Gambling.
From his story it seems like he traded without adequate knowledge, self control and with Greed.
I can't see why a content creator that has amassed a good amount of money would still trade like a greedy trader.
Well nevertheless if it is really true, then I hope he learnt some lessons.
Learning trading is about 80% from experience, infact trading is the definition of experience is the best teacher, that's why is good to back test and an practice in a demo account so you dont need to get those experience from your real money.
So do you think that trading with a demo account can give you a better edge when trading with a real funded account, demo account is just like a kind of familiarizing yourself with how trading works so it's not as if you trade with a demo account you can now do better with main account. I agree that trading is about being experienced but it is being backed up by lucks sometimes because even if you are a pro in trading, there will come days when you can run losses in your trades but the reason why it seems like it doesn't affect them is that they can recover their losses in subsequent trades. However, trading comes with its own risk so you should be able to trade responsibly to avoid regrets.